Waves

CHAPTER 6 : WAVES2003

1.Which graph represents the sound wave with the highest pitch?

2.The diagram shows an arrangement of apparatus for light diffraction experiment.

Which diffraction pattern appears on the screen?

3.The diagram shows an electromagnetic spectrum.

The waves at P, Q, R and S are

P

Q

R

SAUltraviolet X-ray

MicrowaveInfraredBX-ray

UltravioletInfraredMicrowavesCMicrowaveInfraredUltravioletX-rayDX-ray

InfraredUltravioletMicrowave4.At an airport, a passenger's bag is placed in the baggage scanner.

The contents in the bag are examined by using

A X-ray

gamma rays

C ultraviolet rays

infrared rays

5.Ahmad shouts in front of a high wall. He hears the echo of his voice 1.2 seconds later.

The velocity of sound in air is 340 m s-1.

What is the distance between Ahmad and the wall?

A 204 m

283 m

C 340 m

408 m

816 m6.The following is a block diagram of a radio transmitter.

X is

Aa tuner

Ba filter

Ca detector

Da modulator

20047.A system is oscillating at its natural frequency without damping.

What happens to the total energy of the oscillating system?

A It remains constant

B It decreases

C It increases

8.Which graph represents a wave with amplitude of 4. 0 cm and period of 0.05 s?

9.Which diagram shows the correct pattern of reflected water waves?

10.The diagram shows an interference pattern of two coherent water waves of sources, P and Q.

Which of the positions A, B, C or D, does destructive interference occur?

11.The diagram shows an ultrasonic waves transmitted from a boat to the seabed to determine the depth, D, of the sea. The speed of the ultrasonic waves in water is 1500 m s-1. The echo of the waves is received 2.0 s after the transmission.

What is the value of D? A375 m

750 m C1500 m

3000 m

6000m

12.Which phenomenon indicates that light is a transverse wave?

AReflection

BRefraction

CPolarization

DDiffraction

200513.Which graph represents amplitude modulated waves?

14.A tilted basin contains water. Water is dripped at a constant rate into the basin as shown in the diagram below.

Which pattern of the wavesfronts will be observed in the basin?

15.In a Young's double slit experiment, red fringes are formed on the screen when a red light source is used.

What will be observed if the red light source is replaced by a blue light source?

A Number of fringes decreases

B Brightness of the fringes increases

C Distance between fringes decreases

16.The diagram shows a wavefront pattern produced by a dipper vibrating at a frequency of 12 Hz in a ripple tank.

What is the speed of the waves?

A 2 cm s-1

B 8 cm s-1C 12 cm s-1D 18 cm s-1

E 36 cm s-117The diagram shows the wavefronts of a plane wave incident on a plane reflector.

Which statement is correct about the reflected and incident waves?

A The speed of the reflected waves is the same as the speed of the incident waves

BThe wavelength of the reflected waves is shorter than that of the incident waves

CThe frequency of the reflected waves is lower than that of the incident waves

The directions of the reflected waves are always at right angles to the incident waves

18The diagram shows the wave pattern formed by waves from two coherent sources, X and Y.

Destructive interference occurs at

AR only

BQ only CP and Q

DP and R

19The graphs show the cross-sections of water waves.

Which wave has the greatest energy?

200620A thin guitar string is strummed hard. It will produce a loud and high pitch sound. The most suitable graph to represent the above situation is

21The process of combining audio and radio frequency signals is known as

AresonanceBdamping

CmodulationDrectification22Diagram 18 shows the cross section of water waves.

Which of the following statements is true about the water waves?

AT and U have the same phase

B Wave energy is transferred from position from S to U

CThe wave length is the distance between S and U

D

The particle at U oscillates in a direction parallel to the direction of the wave propagation

23Diagram 19 shows ripple tank with a sloping base and a vibrator being vibrated.

Which of the following wave patterns can be seen on the screen?

24Diagram 20 shows the interference patterns for water waves from two coherent source S1 and S2.

Which of the following shows the superposition of the waves at point Y?

25Diagram 21 shows a submarine transmitting ultrasonic waves directed at a big rock on the sea bed. After 10 seconds, the submarine detects the reflected wave.

Calculate the distance of the submarine from the big rock.

[Velocity of ultrasonic wave = 1 560 m s-1.]A3.9 km

B7.8 kmC15.6 KMD31.2 kmE156.6 km

200726 Diagram 26 shows a wave pattern on water.

Diagram 26

Wavelength is the distance between the pointsAP and QBP and R

CQ and S

DR and S

27Diagram 27 shows a load being oscillated on a spring.

Diagram 27

Based on Diagram 27, which of the following displacement-time graphs represents oscillation of the load from P to Q and back to 0?

28Which of the following characteristics of waves, changes when the waves are reflected?

A

Direction of propagationBWavelength

CFrequency

DSpeed

29Diagram 29 shows water waves propagating in an area of different depths.

Which of the following diagrams shows the propagation of the waves correctly?

2008

30Diagram 17 shows the displacement-distance graph of a wave. The frequency of wave is 5.0 Hz.

What is the velocity of the wave?

A 50 cm s-1

B 75 cm s-1

C 100 cm s-1

D 150 cm s-1

31What happens to the wave length and the magnitude of the velocity of water waves when it reflected?

Wave length

Magnitude of velocity

A

Unchanged

Unchanged

B

Increases

Decreases

C

Decreases

Increases

D

Increases

Unchanged

32Diagram 18 shows water waves passing a block of rock in a river.

Which phenomenon explains the propagation of waves at X?

A Reflection

B Refraction

C Diffraction

D Interference

33In which diagram will destructive interference occur when the wave meet?

34What is the correct relationship between the wave length of an electromagnetic radiation and the energy it carries?

Wave length

Energy carried

A

Short

High

B

Short

Low

C

Long

High

D

Long

Low

Direction of wave propagation

Deep area

Diagram 29

Shallow area

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