CHAPTER -1MEASUREMENT

1. The error in a measurement may occur due to:-

a) Negligence (b) Inappropriate methodc) Faulty apparatus (d) All of the above.

2. In any measurement the accurately know digits and the first doubtful digits are called.

a) Measurement figures (b) Significant figuresc) Doubtful figures (d) Accurately figures

3. The least count of meter rod is: -

a) 0.01mm (b) 0.1mmc) 0.1 cm (d) Non of these

4. Each base quantity is considered a dimension denoted by a specific symbol written within.

a) Small bracket (b) Square bracketc) Braces bracket (d) None of the above

5. The term √Tx1/m has dimension:-

a) [LT] (b) [LT-2] c) [LT-1] (d) [L-1T]

6. How many years in one Second?

a) 3.1 x 10-6 (b) 3.1 x 10-7 c) 3 x 10-8 (d) 3.1 x 10-9

7. How many meters are there in one light year (speed of light = 3.0 x 108 m/s:-

a) 9.5 x 1014 cm (b) 9.5 x 1012 mc) 9.5 x 1016 m (d) none of the above

8. Diameter of an atom is measured in meters in the order of

a) 10-20 (b) 10-10

c) 1010 (d) 1020

9. Time taken by light to cover a distance from moon to earth is :-

(a) 1 min 20 sec (b) 2 min 20 secc) 8 min 20 sec (d) 1 hr 20 sec

10. The uncertainty in the time period of a vibrating body in found by :-

a) Last count x number of vibrationsb) Last count / no of vibrationsc) Last count x 100%/( no: of vibrations)d) Last count – no of vibrations

11. Orange light emitted from krypton-86 atoms was used to define

a) Kilogramb) Meterc) Centimeterd) Second

12. The dimensions of | ½ at2 | are that of

a) Accelerationb) Velocity c) Length d) Time

13. Gega means

a) 109

b) 10-9

c) 10-12

d) 1012

14. An example of fundamental quantity is

a) Areab) Volumec) Lengthd) Velocity

15. The dimensions of frequency are

a) HZb) T-1

c) MLTd) LT-1

_____16. The dimensions of term √TX l/m is the same as the dimension of

a) Accelerationb) Velocityc) Forced) Non of these

17. How many days are there in one second?

a) 1.16 X 10-5

b) 1.16 X 10-8

c) 8.64 X104

d) 8.64 X10-4

18. The time taken by the light form sun to earth is

a) 1 min 20 sb) 6 min 20 s c) 8 min 20 sd) 7 min 20 s

19. The diameter of the earth is about

a) 6.4 X 106 mb) 6.4 X 1012 mc) 1.28 X 107 md) 1.28 X 1011 m

20. The time taken by light from moon to earth is 1 min 20S. the distance b/w earth and moon is a) 2.4 X 108 mb) 3.75 X 106 mc) 2.4 X 1010 md) 3.75 X 108 m

21. An example of fundamental unit is

a) Newtonb) Amperec) Jouled) Coulomb

22. There are __________ nano meter in one meter

a) 10-9

b) 109

c) 10-19

d) None of these

23. The diameter of radian is

a) [T-1]b) [ML-1]c) [LT]d) None of these

24. The specific temperature of a filament bulb is

a) 1800o C to 2000o Cb) 2000o C to 3000o Cc) 3000o C to 4000o Cd) None of these

25. According to the equation E=mc2 the energy obtained from 1KG isa) 9 X 1017 Jb) 9 X 1016 Jc) 3 X 108 Jd) 9 X 108 J

ANSWERS:

1. d2. b3. c4. b5. c6. c7. d8. b9. a10. b11. b12. c13. a14. c15. b16. b17. a18. c19. c20. a21. b22. b23. d24. b25. b

CHAPTER – 2VECTOR, FORCE AND TORQUE

1. A vector in space has.

a) Three components (b) one components c) Two components (d) None of the above

2. All of these are vectors except.

a) Torque (b) Impulsec) Density (d) Momentum

3. The unit vector in the direction of a vector ‘A’ of magnitude 2 is:-

a) A/2 (b) 2Ac) A2 (d) A2/2

4. Dot product of two non-zero vectors is zero when the angle between them is.

a) 300 (b) 600

c) 900 (d) 450

5. The angle of a vector A = Axi – Ayj with x-axis will be in b/w,

a) 00 to 900 (b) 1800 to 2700

c) 2700 to 3600 (d) 900 to 1800

6. The unit vector in the direction of vector A = 2i – 2j + k is

a) 2i – 2j + k (b) 2i – 2j + k 3 9

c) 2i – 2j + k (d) 2i – 2j + k 5

7. A force of 10 N acts on a body and displaces it through a distance of 20 cm in the direction of force the work done by the force is

a) 20J (b) 10J (c) 200J (d) 2J

8. Which of the following is true?

a) A x B = B x A (b) A. B = -B. Ac) A x B = - B x A (d) A. B B. A

9. If A = 2i – 3j and B = i + 2j , then A . B is equal to

a) 2i – 6j (b) 8 (c) -4 (d) Zero

10. k .i = i . k is equal to

a) Zero (b) j (c) -1 (d) 1

^ ^ ^

11. If A x B = 0 then either of the two vector is a null vector or A and B are

a) Perpendicular (b) Parallel (c) Inclined(d) None of the above

12. F1 and F2 are the x and y-components of a force F respectively, making an angle θ with x – axis. The angle θ is given by.

a) θ = tan F1F2 (b) θ = tan-1 F2/F1

c) θ = tan-1 F1/F2 (d) θ = tan-1 F1F2

13. If A = 2j and B = 4j then A x B is equal to

a) 8j (b) zero (c) 8 (d) 6k

14. The magnitude of a vector A = Axi + Ayj + Azk is

(a) Ax2 + Ay2 + Az2 (b) (Ax + Ay+ Az)2

(c) (Ax2 + Ay2 + Az2)1/2 (d) A/√3

15. If A = Ai and B = Bj then A.B is equal to

(a) AB (b) Zero (c) 1 (d) ABk

16. The Scalar product of two vector is negative when.

(a) They are parallel. (b) They are perpendicular (c) They are anti-parallel (d) They are equal

17. If A . B = B . A then the scalar product is:

(a) Associative (b) Additive (c) Commutative(d) Multiplicative

18. For A 0 if A.B = 0 and A x B = 0 then

(a) B will be a zero vector (b) A & B are perpendicular (b) B and A are parallel to each other (c) B will be non zero vector

19. If A x B = C points along +ive z – axis then the vectors A and B must lie in

(a) zx – plane (b) xy-plane (c) yz-plane(d) xz- plane

20. If A = 3i + 6j, B= xi + k and A.B = 12, then x-will be equal to

(a) 2 (b) 4 (c) 12 (d) 3

21. If A = K and B = -6j, then A x B is equal to

(a) -6i (b) Zero (c) 6i (d) -6

22. The scalar product of A and B is given by

(a) A . B = A (Bcosθ) (b) A . B = A Bcosθ(c) A . B = B (A cosθ) (d) All of the above

23. The position vector r in y – z plane is expressed as

(a) r = xi +yj (b) r =yj + zk (c) r = xi + zk(d) r = xk + yj

24. The scalar product of two non-zero vectors which are at right angle to each other is equal to.

(a) Zero (b) Infinity (c) Maximum(d) None of the above

25. If the difference between vectors A1 and A2 is vector A

(a) A = A1 + A2 (b) A = A1 + (-A2)(c) A = A1 X A2 (d) None of the these

26. When a vector A is multiplied by a number n then the magnitude of the resultant vector becomes.

(a) A (b) n A (c) A (d) nn A

27. In three dimensional space the position vector is written as.

(a) r = xi + y k + zy (b) r = xj + yi + zk(c) r = xk + yj + zi (d) r = xi + yj + zk

28. Torque is a

(a) Vector quantity (b) Scalar quantity(c) Base quantity (d) None of these

29. In a couple the resultant of two force is.

(a) 2F (b) F/2 (c) F (d) zero

30. Torque is equal to zero if

(a) θ = 1800 (b) θ = 900 (c) θ = 300

(d) θ = 600

31. In rotational motion the torque is equal to

(a) Rate of change of velocity (b) Rate of change of linear momentum(c) Rate of change of angular momentum (d) Change of linear momentum

32. Torque = Force x________?

(a) Momentum (b) Mass (c) Moment arm (d) Speed

33. When r and F are perpendicular to each other then torque is

(a) r F sin θ (b) Zero (c) r F Cos θ (d) rFn

34. A body is said to be in complete equilibrium

(a) F = 0 (b) T = 0 (c) F = 0 and T = 0(d) F = 0 and T = 0

35. A body will be in translational equilibrium if.

(a) T = O (b) P = O (c) F = O(d) L = O

36. The magnitude of torque is defined as.

(a) rF sin θ (b) rF cos θ (c) rF tanθ(d) rF cot θ

37. Torque acting on a particle with respect to origin is given by.

(a) T = r x F (b) r .F = T T = r x ½ F(d) T = ½ (r x F)

38. SI unit of torque is

(a) N/m (b) N/m2 (c) N m2

(d) N m

39. Dimension of toque is.

(a) MLT-2 (b) ML-1T-2 (c) MLT(d) ML2T-2

40. Torque is a rotational analogue of.

(a) Force (b) Velocity (c) Inertia(d) Impulse

41. The vector product of position vector r and force F is equal to

(a) Acceleration (b) Velocity (c) Torque(d) Momentum

42. The torque produced by a central force about an axis is.

(a) Minimum (b) Zero (c) Maximum (d) Non of these

43. The magnitude of the torque exerted by the couple when force is F and arm of couple is l, is given by.

(a) T = F/l (b) T = Fl (c) T = l/F(d) T = √Fl

44. Torques producing anti-clockwise rotations are taken as

(a) Positive (b) Negative (c) Zero (d) All of the above

45. If the moment arm about the origin is zero then torque is:

(a) Infinite (b) Maximum (c) Minimum(d) Zero

46. When two equal and anti-parallel force act on a body and produce rotation, they are said to constitute a.

(a) Torque (b) Couple (c) Angular velocity(d) Moment of force

47. Three coplanar force acting on a body keep it in equilibrium they should therefore be.(a) Parallel (b) Non-concurrent (c) Concurrent(d) Non of the above

48. A metallic bob suspended by a string in the vertical plane will be in.

(a) Translational (b) Rotational equilibrium (c) Complete equilibrium (d) None of these

49. The first condition of equilibrium of a body is satisfied if.

(a) Its linear velocity is zero (b) Its linear Acceleration is zero(c) Its angle acceleration is zero (d) Non of the above

50. The cross product of r and F is called (a) Torque (b) Turning effect of force (c) Moment of force(d) All of the above.

ANSWERS: 1. a2. c3. a4. c5. c6. a7. d8. c9. c10. a11. b12. b13. b14. c15. b16. c17. c18. a19. b20. b21. c22. d23. b24. a25. b26. b27. d28. a29. d30. a31. c32. c33. d34. d35. c36. a37. a38. d39. d40. c41. c42. b43. b44. a45. d46. b47. c48. c49. b50. d

CHAPTER – 3FORCE AND MOTION

(MCQs)

1. The change in the position of a body is called.

(a) Speed (b) Velocity (c) Displacement(d) Acceleration

2. Which of the following figures shows positive acceleration?

(a) v (b) v (c) v aa a

(e) v a

3. An object completes one cycle in 2 sec with constant speed in a circle of radius 1m. the magnitude of its acceleration is.

(a) Zero (b) 2 m/s2 (c) π2 m/s2 (d) 4π2 m/s2

4. The limiting value of the ratio ∆s as ∆ t approaches zero is called. ∆t

(a) Speed (b) Instantaneous speed(c) Velocity (d) Instantaneous Velocity

5. The speed of a body at the end of four successive minutes is 20, 25, 30, 35 km/hr. the acceleration of the particles is.

(a) 5km/hr-min (b) 5km/hr2 (c) 5 km/min2

(d) 5 km-hr/min

6. Motion of a body is called two dimensional if it has

(a) Only x component (b) x and y components (c) No component (d) Only y component

7. In a projectile motion the horizontal and vertical components of velocity.

(a) Remains constant with time (b) Change uniformly (c) Decrease with time (d) N.O.T

8. The range of projectile for these two angles is the same.

(a) (100, 700) (b) (50, 850) (c) (600, 400)(d) (800, 150)

9. The angle for which the max height is equal to the range of projectile is.

(a) 730 (b) 740 (c) 750 (d) 760

10. A ball is thrown horizontally from a point 45m high with velocity of 10m/s. the time to reach the ground is.

(a) 4.5 sec (b) .22 sec (c) 3.03 sec (d) 30.3 sec

11. The angle for which the range of projectile is equal to half of its max range is

(a) 150 (b) 300 (c) 450 (d) 600

12. The change in momentum of a body is equal to.

(a) Force (b) Impulse (c) Torque(d) N.O.T

13. A stone has a mass 40-gram. Its weight is.

(a) 392 N (b) 39200N (c) .392N (d) 3.92N

14. Body A of mass 2kg moving with 4m/s collides elastically with B which is at rest. If both are identical then the velocity of A after collision is.

(a) Zero m/s (b) 2 m/s (c) 4 m/s (d) 8 m/s

15. In the above case the velocity of B after collision is.

(a) Zero m/s (b) 2 m/s (c) 4 m/s (d) 8 m/s

16. The K.E of a body in terms of its momentum P is.

(a) P2/2m (b) 2m/p2 (c) 2p2/m (d) 2pm

17. A very heavy particle moving with 100 m/s collides elastically with a very light body at rest. The velocity of light body after collision is.

(a) 0 m/s (b) 100 m/s (c) 200 m/s (d) N.O.T

18. The speed of a 4 kg body with momentum 16 kg m/s is

(a) 4 m/s (b) 16 m/s (c) 64 m/s (d) .25 m/s

19. If the momentum of a body decreases by 20% the % age decrease in K.E is

(a) 36 (b) 40 (c) 30 (d) 44

20. The velocity of a projectile at maximum height is

(a) Vi sinθ (b) Vi cos θ (c) Maximum (d) Zero

21. The time for maximum height of projectile is given by.

(a) vi sinθ/g (b) 2 vi sin θ/g (c) vi sin θ/g(d) vi sin2 θ/g

22. Horizontal range of projectile is Vi2/g sin2θ. for what value of 2θ range is max.

(a) 900 (b) 450 (c) 00 (d) N.T.O

23. Body A of mass 2 kg moving with 4m/s collides elastically with B which is at rest. If both are identical then the velocity of B after collision is then the total momentum after collision is

(a) 8kg m/s(b) 16 kg m/s(c) 4 kg m/s C(d) None of them

3 KM

24. A body moves from A to B and then from B to C as shown 90 in the figure the displacement of the body is A 4km B

(a) 7 KM(b) 5 KM(c) 12 KM(d) 0 KM

25. In the above figure, if he takes 5 hours from A to C then the average velocity is

(a) 1.4 Km/h(b) 1 Km/h(c) 2.4 Km/h(d) Non of these

ANSWERS:

Q.No. Ans Q.No. Ans

1

2

3

4

5

6

7

8

9

10

11

12

13

c

b

c

d

a

b

d

b

d

c

a

b

c

14

15

16

17

18

19

20

21

22

23

24

25

26

a

c

a

c

a

a

a

a

a

a

b

b

d

CHAPTER – 4WORK, POWER & ENERGY

1. A body is pushed through a distance of 2m by a force of 20N applied perpendicular to the direction of displacement. The work done is.

(a) Zero (b) 20J (c) 40J (d) 10J

2. The work done against the force of friction is.

(a) Positive (b) Negative (c) Zero (d) None

3. Which of the following is a conservative field?

(a) Gravitational field (b) Electric field (c) Magnetic field(d) All of the above

4. A machine of power 10 watts operates for a period of 2 minutes. The work done by it is.

(a) 20J (b) 120J (c) 1200J (d) 5J

5. The power required to pump 1000kg of water up 60m in one minute is.

(a) 1000 watt (b) 6000 watt (c) 9800 watt(d) 980 watt

6. If the velocity of the body is doubled its KE becomes

(a) 4 time (b) Double (c) One-half(d) One third

7. Energy stored in an atom is.

(a) Heat energy (b) K.E (c) P.E (d) Solar energy

8. When the mass and speed of a body are doubled the K.E becomes.

(a) 16 times (b) 4 times (c) 3 times(d) 8 times

9. Watt is the unit of.

(a) Flux (b) Energy (c) Work (d) Power

10. P.E is increased when work is done.

(a) By the field (b) Against the field (c) Along the field(d) All of the above

11. The K.E required by a mass “m” after covering a fixed distance “S” from rest under a constant force is directly proportional to.

(a) m (b) 1/√m (c) √m (d) m2

12. Work energy principle implies that the work done by the applied force is.

(a) Greater then the change in K.E (b) Equal to change in KE(c) Equal to P.E (d) Less than the change in K.E

13. The unit of power in British engineering system is.

(a) Kilowatt (b) Horse Power (c) Joule (d) Watt

14. 25000 watts power is equal to

(a) 2.5 Kilowatt (b) 25 Mwatt (c) 50 HP(d) 33.5HP

15. The dimensions of K.E are.

(a) ML2T-2 (b) ML-1T2 (c) ML-2T2

(d) ML-1T-1

16. Which of the following is correct for power?

(a) P = F.A (b) P = W.V (c) P=F.V(d) P = F x V

17. The K.E acquired by a body of mass 500gm moving with a speed of 2m/sec is.

(a) 0.5J (b) 2J (c) 1J (d) 0.25J

18. The mathematical expression for absolute P.E is given by.

(a) Gm Re (b) mMe (c) GmMe Me Re2 Re

(d) GmMe Re2

19. The escape velocity at the earth’s surface is.

(a) 11 x 103 m/sec (b) 1.1 x 103 m/sec (c) 1.1 x 105 m/sec(d) 11 x 104 m/s

20. The fossil fuels are.

(a) Coal (b) Petroleum (c) Natural gas(d) All of the above

21. One kilowatt hour is equal to.

(a) 36000J (b) 3600J (c) 3.6 x 106J(d) 36 Joule

22. The work done in lifting a body through some height against the force of gravity is stored in it as.

(a) P.E (b) K.E (c) Elastic energy (d) Heat energy

23. The total work done is zero if the angle between force and displacement is.

(a) 450 (b) 00 (c) 900 (d) 1800

24. The consumption of energy by a 60-watt bulb in 2 sec is.

(a) 0.02J (b) 30 J (c) 120 J (d) 60 J

25. Lowering of a bucket full of water is an example of.

(a) Gravitational force (b) Negative work done(c) Positive work done (d) Work done

26. The minimum velocity required by an object to go out from earth’s gravitational pull is called.

(a) Drift velocity (b) Terminal velocity(c) Escape velocity (d) Angular velocity

27. The power rating of an electric motor that draws a current of 3A when operated at 120V is.

(a) 540w (b) 1080w (c) 40w (d) 360w

28. Which of the following pairs do not have identical dimensions?

(a) Momentum & impulse (b) Work & energy (c) Torque and energy (d) Mass & moment of inertia.

29. The relation between the escape velocity and orbital speed Vo is given by.

(a) Vesc = Vo (b) Vesc = √2 Vo (c) Vesc = ½ Vo(d) Vesc = 2 Vo

30. The largest deposits of coal the world over are found in.

(a) Pakistan (b) U.S.A (c) Saudi Arabia(d) Russia

31. The solar energy absorbed by earth every year is about.

(a) 4 x 1012 KWh (b) 4 x 1017 KWh (c) 4 x 1015 KWh (d) 0.4 x 1017 KWh

32. The tidal energy is due to the gravitational pull of.

(a) Sun (b) Moon (c) Mars (d) Planted

33. Pakistan’s first nuclear reactor at Karachi (KANNUP) produces electricity.

(a) 400 megawatt (b) 137 megawatt(c) 200 megawatt (d) 600 megawatt

34. In Pakistan, the nuclear power reactors are located at.

(a) Lahore, Karachi (b) Rawalpindi, Karachi(c) Quetta, Chashma (d) Karachi, Chashma

35. The huge reservoirs of sui gas are located at Sui in.

(a) Punjab (b) N.W.F.P (c) Sind(d) Baluchistan

36. Tidal power stations are installed in the countries.

(a) France (b) Alaska (c) Argentina(d) All of the above

37. Which of the following is not conservative? (a) Magnetic force (b) Electric force (c) Gravitational force(d) Frictional force

ANSWERS:

1. a2. b3. d4. c5. c6. a7. c8. d9. d10. b11. a12. b13. b14. d15. a16. c17. c18. c19. a20. d21. c22. a23. c24. b25. b26. c27. d28. d29. b30. b31. b32. b33. b34. d35. d36. d37. d

CHAPTER – 05

1. The acceleration of an object falling freely is.

(a) Zero (b) -9.8 m/s2 (c) 9.8 m/s2

(d) None

2. The apparent weight of a person in an upward moving lift with acceleration “a” is

(a) Zero (b) mg (c) mg + ma (d) mg-ma

3. The SI unit for measuring angular acceleration is.

(a) rad/s2 (b) rev/s2 (c) rad/s (d) rev/s

4. A body moving with uniform acceleration on a circular path has

(a) No Centripetal force (b) Centripetal force(c) Constant velocity (d) no direction

5. If a racing motorcycle moves with a velocity of 10 m/s on a circle of radius 20m, then its angular velocity is

(a) 0.5 rad/s (b) 10 rad/s (c) 20 m/s(d) 200 m/s

6. Both centripetal force and centripetal acceleration.

(a) Act along same direction (b) Act in opposite direction(c) Act perpendicular (d) None

7. The momentum of any spinning body is called.

(a) Linear Momentum (b) Spin Angular momentum(c) Orbital angular momentum (d) None

8. The diver can spin faster when its moment of Inertia.

(a) Gets maximum (b) gets minimum(c) Become Infinite (d) None

9. The SI unit of angular momentum is

(a) kg sm-2 (b) kgms-1 (c) kgm2 s-1

(d) kgm2 s-2

10. The moment of Inertia of 100 kg sphere and having 50cm radius is.

(a) 100 kg m2 (b) 0.25kg m2 (c) 500kg m2

(d) 2.5kg m2

11. The rotational K.E of any hoop of radius r is given by.

(a) 1/2mr22 (b) 1/2 mr2 (c) r22

(d) 1/2r2

12. A disc of mass “m” is moving down on an incline plane then its rotational K.E is

(a) 1/2 I2 (b) 1/2 r2 (c) 1/2 f2

(d) 1/2 2v2

13. A disc starting from rest rolls down a 10m high hill its velocity at bottom will be

(a) 9.8 m/s (b) 10 m/s (c) 11.4 m/s(d) 14 m/s

14. The minimum velocity required to put a low-lying satellite above the earth is.

(a) √2gR (b) √gR/2 (c) √gk (d) √gR/m

15. The world communication can be done by positioning the geostationary satellites above.

(a) Indian Ocean (b) Pacific Ocean (c) Atlantic Ocean(d) All of the above

16. The dimension of torque is similar to the dimension of

(a) Power (b) K.E (c) Momentum (d) Angular momentum

17. Inertial mass is analogues to

(a) Moment arm (b) Moment of inertia (c) Torque (d) Angular momentum

18. A body is rotating in a vertical circle of radius 2m the tension in the string is minimum at

(a) At top (b) At bottom (c) At sides (d) None

19. The Dimension of angular momentum is similar to the Dimension of

(a) Gravitational constant (b) Momentum (c) Planks constant (d) None

ANSWERS:

1. c2. c3. a4. b5. a6. a7. c8. b9. c10. d11. a12. a13. c14. a15. d16. b17. b18. a19. c

CHAPTER - 6

1. The force experienced by an object moving through fluid is called a.

(a) Static force (b) Dynamic force (c) Field force(d) Drag force

2. The correct expression for terminal velocity is.

(a) 2r2ρ/9g (b) 2gr2ρ/9 (c) 9r2ρ/2g(d) 9gr2ρ/2

3. A fluid is said to be ideal when it appears.

(a) Non viscous (b) incompressible (c) uniform flow(d) All of them

4. The SI unit of viscosity is

(a) Nsm -3 (b) Nsm -2 (c) Ns-1m-2

(d) Ns-2m-2

5. The viscosity of air at 300C in Nsm-2 is

(a) 0.019 x 10-3 (b) 0.029 x 10-3 (c) 0.04 x 10-3

(d) 0.049 x 10-3

6. If each particle of fluid passing through a point follows the same path them flow is called.

(b) Irregular flow (c) Turbulent flow(d) Stream line flow (d) None

7. The product of cross sectional area of the pipe and the speed of flow at a certain point along the pipe is.

(a) Venturies effect (b) Bernoullis effect(c) Torricellis effect (d) flow rate

8. Speed of a fluid flow can be measured by

(a) Barometer (b) Thermometer (c) Ventorismeter(d) Pascal’s meter

9. The density of human blood is.

(a) Lesser then water (b) Nearly equal to water(c) Greater than water (d) Change abruptly

10. The SI unit of flow rate is

(a) m3/s (b) m2/s (c) m2/s2 (d) m3/s3

11. A two meter high tank is full of water. If a hole appears at its middle then the speed of efflux

(a) 4.42m/s (b) 5.42m/s (c) 6.42m/s(d) None

12. In any fluid the effect of decrease in pressure with increase in speed is called as

(a) Viscosity effect (b) speed effect (c) Pressure effect (d) Venturi’s effect

13. The Torricellis’s expression is written as.

(a) V2 = √2g(h1-h2), (b) V2 = √2g(h1 + h2)

(c) V2 = √2g/h1-h2 (d) V2 = √2g/h1 + h2

14. Venturies meter is a device used to measure.

(a) Viscosity of fluid (b) Speed of a fluid(c) Density of a fluid (d) All of the above

15. A standard torr in N/m2 is expressed as.

(a) 133.3 (b) 1333 (c) 13.33 (d) 1.33

16. Newton calculated the value of speed of sound in air which is less then the experimental value by.

(a) 18% (b) 20% (c) 16% (d) None

17. The energy transmitted per unit area per unit time is called.

(a) Loudness (b) Beats (c) intensity (d) Work

18. The ratio of inertial mass to gravitational mass is

(a) 1 (b) 1/√2 (c) 2 (d) none

19. From poles to equator, the value of ‘g’

(a) Increases (b) Decreases (c) Remains constant (d) none

20. If we go inside the earth equal to its radius, the value of ‘g’ becomes

(a) 2g (b) zero (c) -g (d) remains constant

ANSWERS:

1. d2. b3. d4. b5. a6. c7. d8. c9. c10. a11. a12. d13. a14. b15. a16. c17. c18. a19. b20. b

CHAPTER - 7

1. The displacement for the projection of a point moving around circular path is.

(a) x = x0 cos t (b) x = x0 (Sin t +φ )(c) x0 = x cost (d) x0 = x sin t

2. The total energy of mass spring system is.

(a) 1/2 kx2 (b) Kx2 (c) 1/2 kx02

(d) None

3. The concept of damping is used in the.

(a) Suspension system of car (b) Suspension system in aeroplane(c) Suspension system in cycle (d) All of the above

4. In microwave oven the plastic or glass do not heat up because

(a) It contains water molecules (b) Do not contain water molecules(c) None

5. The P.E of S.H.M oscillator will found minimum at

(a) Extreme position (b) Mean position(c) Any distance from its mean position (d) None of the them

6. Sonometer is an instrument though which one can determine

(a) Unknown frequency (b) Amplitude(c) Speed (d) None of them

7. Damping phenomenon produce

(a) Loss in energy (b) Gain in energy (d) Neither gain nor loss

8. If we add more weight in case of mass spring system it’s time period will

(a) Increase (b) Decrease (c) Neither increase nor decrease

9. While deriving the equation for simple pedulum the displacement from its mean position is taken.

(a) Small (b) Large (c) Neither small nor large 10. Maximum velocity of the mass spring system is given by the equation is.

___ ___ __(a) x0 √k/m (b) x0 √m/k (c) x0 √mk(d) None

11. The graph obtained by SHM is.

(a) Sinusoidal wave (b) Cos wave (c) Tan waves

12. The equation for time period of mass-spring system is give by (vertically suspended)

(a) T = 2 π√m/k (b) T = 2 π √x/g (c) T = 2 π √g/x

(d) T = 1/2π √k/m

13. Which one is the example of S.H.M.?

(a) Motion of ball rolling in a curved disk (b) Motion of Swing(c) Motion of a vehicle (d) Non of the them

14. In a Hooks law, force is directly proportion to the.

(a) Displacement (b) Velocity (c) Acceleration (d) None

15. The equation for elastic restoring force is.

(a) kx (b) - kx (c) k/x (d) - k/x

16. The frequency of 2nd pendulum is

(a) 2Hz (b) 1.5 Hz (c) 0.5 Hz (d) 1 Hz

17. If the length of second pendulum is quadrupled its time period becomes

(a) 4 sec (b) 1 sec (c) 2 sec (d) none

18. If the amplitude of S.H. oscillator is doubled, its time period _

(a) Increases by 4 (b) Decreases by 2 (c) Decreases by √2 (d) None

19. When a pendulum clock in a elevator is allowed to fall freely, its time period will

(a) Becomes 2 T (b) Becomes infinite (c) Becomes zero (d) Becomes 4

20. In resonance the amplitude of vibrating body is

(a) Infinity (b) Very large (b) Very small (d) None

ANSWERS:

1. a2. c3. d4. b5. b6. a7. a8. a9. a10. a11. a12. b13. b14. a15. b16. c17. a18. d19. b20. b

CHAPTER – 8

1. In a physical pendulum the torque about the pivot due to gravity is

(a) mg sin θ (b) mg D cos θ(c) mgD sin θ (d) mg cos θ

2. In a S. H. M the period of oscillation is directly preparation to the.

(a) Square of amplitude (b) amplitude(c) Square root of displacement (d) Displacement

3. What will be the phase difference b/w the damping force and driving force?

(a) π/2 (b) π(c) 3 π/2 (d) 2π

4. If two vibrations of the same frequency are super imposed on a system with equal amplitude the max resultant amplitude could be.

(a) Zero (b) √2A(c) A/√2 (d) 2A

5. The Spring constant of a spring is 20N/m the period of 200-gm mass at the end of this spring is.

(a) 0.63 s (b) 0.69 s(c) 6.3 s (d) 63 s

6. Waves do not transport.

(a) matter from one place to another place (b) energy from one place to another place(c) both energy and matter from one place to another place (d) none of them

7. The distance b/w the consective node and anti node is

(a) λ (b) λ/2(c) λ/4 (d) 2

8. The speed of the transvers waves depend upon.

(a) √T/m (b) √m/T(c) √T only (d) √m only

9. Greater is the speed of the sound

(a) greater is modules of elasticity (b) Less is modules of elasticity (c) Greater is the density (d) None

10. The basic condition for path difference in a destructive interference is.

(a) (m + ½) λ (b) (m + 1)λ(c) mλ (d) none

11. The set of all frequencies due to which the string is moving is different loops is called

(a) Quantized frequencies (b) Fundamental frequencies (c) Limited frequencies (d) None of them

12. When a string is clamped b/w two end is plucked in the middle the it will be vibrate in a

(a) Single loop (b) Two loops (c) Three loops (d) None of them

13. All the equation for standing wave can also be applied for

(a) Compressional standing wave (b) Transverse standing waves (c) None of them (d) both of them

14. How many beats a human ear can detect in 1 s

(a) 7 (b) 8(c) 9 (d) 10

15. If the tension in the string is made 4 times of its initial value, the frequency of transverse wave is

(a) Doubled (b) quadrupled (c) Tripled (d) none

16. The frequencies of string higher than fundamental frequency are called

(a) Simple frequency (b) Multiple frequency(c) Over tones (d) None

17. The unit of intensity level “Bell” is equal to

(a) 100 db (b) 10 db(c) 20 db (d) 40 db

ANSWERS:

1. c2. c3. b4. d5. a6. a7. c8. a9. a10. a11. a12. a13. d14. a15. a16. c17. b

CHAPTER – 9

1. Which of the following phenomena of light differs from the other?

(a) Photoelectric effect (b) Dispersion of light(c) Compton effect (d) Pair production

2. Fringe spacing in the interference pattern produced by young double slit experiment depends upon.

(a) Distance between the slits and the screen.(b) Size of the slits (c) Intensity of light (d) Size of the screen

3. Newton rings are experimentally derived from the phenomena of.

(a) Polarization of light (b) resolution of light(c) Interference of light (d) All of the above

4. Monochromatic source of light means source whose.

(a) Intensity is constant (b) Amplitude is constant(c) Wave length is 2m (d) None of the above

5. The light rays, which combine destructively, would mean that resultant.

(a) Intensity decreases (b) Intensity increases (c) Amplitude increase (d) Amplitude decrease

6. Huygens principle is used to explain.

(a) Speed of light (b) dispersion of light(c) Propagation light (d) Reflection of light

7. The phenomena of polarization is done by.

(a) Selective absorption (b) reflection through crystals (c) Scattering through particles (d) All of the above

8. The fringe width in double slit experiment is.

(a) d/D (b) D/2d (c) D/d (d) Dd

9. Newton’s rings are produced due to phenomena of.

(a) Diffraction (b) Interference (c) Dispersion(d) None of the above

10. The middle point of the Newton rings is.

(a) Red (b) Dark line (c) Bright line (d) None

11. If the movable mirror M, in Michelson interferometers moved a distance of /4 the path difference changed by.

(a) (b) 2 (c) /2 (d) /4

12. Polarizers are made by special substance called.

(a) Dichoric substance. (b) Organic substance(c) Super conductors (d) None of the above

13. A Ray coming from a rare medium is reflected from the boundary of denser medium will have.

(a) 900 phase change (b) 1800 phase change(c) 270 phase change (d) No change in phase

14. X-rays shows diffraction from.

(a) Crystal (b) simple grating (c) Narrow slits(d) None of the above

15. To get consecutive dark or bright fringes the mirror in Michelson interferometer should be moved by.

(a) /2 (b) (c) 2 (d) 3

16. Corpuscular Theory explains that light consists of

(a) Particles (b) Waves (c) Particles of wave (d) Neither particles nor waves

17. In young’s double slits experiments of conditions for destructive interference is that the PD is

(a) mλ (b) (m + 1/2 )λ(c) (m + 1) λ/2 (d) (m + ½)λ/2

18. The bending of light around the edges and corners of an obstacle is known as

(a) Interference (b) Diffraction (c) Refraction (d) Transmission

19. The Braggs equation, in x-rays diffraction is given by

(a) d sinθ = mλ (b) 2dsin θ = mλ(c) d/2 sinθ = mλ (d) dsin θ = (m + ½)λ

20. Which of the following phenomenon shows that wave length of light is shorter than wave length of sound?

(a) Interference (b) Diffraction (c) Polarization (d) Refraction

ANSWERS:

1. b2. a3. c4. d

5. a6. c7. d8. c9. b10. b11. c12. a13. b14. a15. a16. a17. b18. b19. b20. b

CHAPTER – 10GEOMETRICAL OPTICS

1. Critical angle of a Medium depends on.

(a) Refractive index of the medium (b) Speed of light in air(c) Intensity of the beam of light (d) relative refractive

Index of the two medium

2. Television signals are changed in to light signals by means of.

(a) Transistor (b) Decoder (c) LED(d) Optical fibre

3. Cladding in optical fibre is used to.

(a) Absorb unnecessary light (b) Produce total internal Reflection (c) Transmit light (d) Filter light

4. The ability of an instrument to reveal the minor details of any viewed abject is called.

(a) Capacity (b) Power (c) Resolving power(d) Band with

5. Two thin lenses of focal length 20cm and 25cm are placed in contact. The effective power of the combination.

(a) 1/2 diopter (b) 9 diopter (c) 1/5 diopter(e) 1/24 diopter

6. A convex lens of focal length f1 and concave lens of focal length f2 are placed in contact the combination will act as convex lens if

(a) f1 7f2 (b) f1 < f2 (c) f1 = f2

(d) f1 = 2f2

7. For a real object a convex mirror always from an image, which is.

(a) Real and inverted (b) virtual and inverted(c) Virtual and erect (d) real and magnified

8. The power of converging lens is 2 diopter its focal length will be

(a) 2m (b) 2cm (c) 5m (d) .5m

9. A convex lens of glass is immersed in water compared to its power in air its power in water will.

(a) diminish for red light and increase for blue light(b) not change at all(c) increase (d) Diminish

10. If we decrease the aperture of a lens change will occur in

(a) Position of the image (b) size of the image(c) Intensity of the image (d) Both position and size

11. A cut diamond sparkles because of.

(a) Its hardness (b) its high refractive index(c) Emission of light by diamond (d) absorption of light

11.(b) If we take two lenses of same power are placed in contact with each other the focal length of the combination will then.

(a) Increases (b) decreases (c) Remain same as that ofIndividual lens

(e) None

12. A man 2.2m tall stands 6m in the front of a plane mirror the image will be tall of.

(a) 2.2m (b) 1.6m (c) 6m (d) 67 inches

13. The relationship between image size I and image distance d for real image formed by a converging lens which graph best representation of the relation ship.

I I(a) (b)

I(c) (d)

d

14. The length of astronomical telescope for normal adjustment is.

(a) fo x fe (b) fo + fe (c) fo-fe (d) fofe

15. The refractive index of a given piece of transparent quartz is the greater for.

(a) Violet light (b) Green light (c) Red light(d) Blue light

16. The minimum distance b/w the object and its real image formed by a convex lens of focal length f is

d d

d

(a) f (b) 2f(c) 2.5f (d) 4f

17. The power of the lens is one dioptre, if its focal length is

(a) 1cm (b) ½ cm(c) 1 meter (d) 10 cm

18. A normal eye can see an object distinctly if it is placed at a distance of:

(a) 15 cm (b) 25 cm(c) 35 cm (d) 45 cm

19. Final image formed by a simple microscope is

(a) Real and erect (b) real and inverted(c) Virtual magnified and erect (d) virtual, inverted and magnified

20. If half of a convex lens is covered then it will give:

(a) No image of an object(b) Clear image as before when it was not covered (c) An image with less brightness (d) Half image of the object

ANSWERS:

1. d2. c3. b4. c5. b6. b

7. c8. d9. b10. c11. b12. a13. a14. b15. c16. d17. c18. b19. c20. c

CHAPTER – 11

(HEAT AND THERMODYNAMICS) 1. The unit of Boltzman constant K is.

(a) JK-1 (b) JK (c) KJ-1 (d) JC0

2. The value of Bottzman constant is.

(a) 1.38 x 10-24 JC-1 (b) 1.38 x 10-23 JK-1

(c) 1.38 x 10-20 J/K (d) 1.38 x 10-23 J/mol

3. For one mole of an ideal gas the gas equation is.

(a) PV = nRT (b) PV = 3RT

(c) PV = NT (d) PV = RT

4. The mass m of a single atom in terms of molecular mass M and Avogadro number NA is given by.

(a) M/NA (b) NA/M (c) NAM (d) N-O.T

5. The average K.E of a molecule is equal to.

(a) 2/3 KT (b) 3/2 KT (c) 3KT (d) 2KT

6. The value of universal gas constant R is given by.

(a) 8.314 J kmol-1 K-1 (b) 8.314 J mol-1 K-1

(c) 8314 K mol-1 K-1 (d) 8314 J K mol-1 K-1

7. The total number of molecules “N” in a gas is calculated in terms of number of moles n and Avogadro number NA as

(a) N = n / NA (b) N = NA/ n (c) N = NA n(d) N.O.T

8. The average K.E per molecule depends on the.

(a) Pressure (b) Volume (c) Temperature (e) All of these

9. The pressure of an ideal gas can also be written in terms of ρ and velocity v as.

(a) P = 1/2 ρV2 (b) P = 1/3 ρ2V

(c) P = 1/3 ρV2 (d) P = 1/2 ρV2

10. The energy added to a system in such a way that the difference of temperature is not directly involved is called.

(a) Heat (b) Internal energy (c) Work (d) N.O.T

11. The process in which the pressure of the gas remains constant is.

(a) Isochoric (b) Isobaric (c) Isothermal(d) Adiabatic

12. The no of moles in 5 gram of helium is.

(a) 5 (b) 4 (c) 20 (d) 1.25

13. If the temperature of LTR is 350 K and the temperature of HTR is 700 K then the efficiency of a heat engine is.

(a) 40% (b) 50% (c) 60%(d) 70%

14. For an ideal gas Cp-Cv is equal to

(a) Plank’s constant (b) Universal gas constant(c) Boltzman constant (d) Joules constant

15. The efficiency of Carnot engine in terms of LTR temperature T2 and HTR temperature T1

is given by.

(a) 1-T1/ T2 (b) (T2-T1)/ T1

(c) T1-T2/ T1 (d) T1/ T1-T2

16. The efficiency of cornot engine is

(a) 100% (b) >100% (c) <100% (d) None of these.

17. Molar heat capacity of a gas at constant volume is given by.

(a) Cv = n ∆ T (b) Cv = ∆ Qv ∆Qv n∆t

(c) Cv = ∆ Qv (d) Cv = n ∆ Qv

n ∆ T18. Which one is not the unit of temperature?

(a) K (b) C(c) J (d) Fo

19. Work performed to produced 1gm of water by rubbing two ice blocks together is

(a) 336J (b) 540J(c) 670J (d) 746J

20. The graph shown in the figure represents

p P1, v1, T

P2, v2, T

(a) Adiabatic process (b) Isothermal process(c) Isobaric process (d) Isochoric process

ANSWERS:

1. a2. b3. d4. a5. b6. b

v

7. c8. c9. c10. c11. b12. d13. b14. b15. c16. c17. b18. c19. a20. b