quiz2003 nov

7/23/2019 Quiz2003 Nov

http://slidepdf.com/reader/full/quiz2003-nov 1/6

Bangladesh University Engineering and TechnologyDepartment of Physics Sessional Quiz 200

Name: Roll No.: Section:

Department: Group/Batch No:

Answer any 10 (ten) questions Time: 40 min

!" #n the Boy$s method e%periment &hat is the shape of the li'uid lens( E%plain ho& youcan determine the focal length of this li'uid lens(

2" )hat are *issa+ous figures( )rite do&n the conditions for &hich *issa+ous figures &ill

,e a circle and a straight line"

" E%plain ho& a thermocouple can ,e used to measure an un-no&n temperature( )hat doyou mean ,y the cali,ration curve for a thermocouple(

7/23/2019 Quiz2003 Nov


." Sho& ho& you determine the value of time ,ase graphically" *et the line fre'uency of a

supply ,e .0 /z" )hat fre'uency you have to ad+ust in fre'uency generator functiongenerator1 to get an appro%imately steady four loops(

" State the la& of pressure of gas3 volume remaining constant" 4ame the apparatus that is

used in the determination of the pressure co5efficient of air" )hy it is called athermometer(

6" )rite do&n the e%pression for the time period for a spring5mass system" 7rom this

e%pression derive a relationship ,et&een the effective mass and the mass that is attached

to the spring" Dra& the graph and point out the position of effective mass"

7/23/2019 Quiz2003 Nov


8" Dra& the optical diagram for determining the focal length of a concave lens" 9lso

indicate the o,+ect distance and image distance for concave lens" )hat is inde%correction(

:" Dra& the circuit diagram for the e%periment to determine the un-no&n resistance ,y P";"Bo%" /o& do you -no& that your connection is correct( )rite do&n the la&s that you

have verified in your e%periment"

<" )hat is e"m"f"( Dra& the circuit diagram for the comparison of the e"m"f" of t&o cells"

=no&ing the e"m"f" of one cell can you determine the potential drop per unit length of the

&ire(

7/23/2019 Quiz2003 Nov


!0" Dra& the circuit diagram for the measurement of mechanical e'uivalent of heat" )rite

do&n the &or-ing formula ,y mentioning each term" )ho does the &or- in thise%periment(

!!" )hat is photoelectric effect( Sho& graphically ho& you determine the thresholdfre'uency of a photocathode and value of the Plan-$s constant in the photoelectric effect

e%periment(

!2" State and e%plain /oo-e$s la&" )rite do&n the names of the different types of elastic

modulii" )hat is the ratio of >oung$s modulus of the t&o &ires of same material &hen

the length of one &ire is t&ice the other(

7/23/2019 Quiz2003 Nov


!" )hat is the unit of thermal conductivity( )rite do&n the &or-ing formula in determining

the thermal conductivity of a ,ad conductor ,y *ee$s method and e%plain its differentterms"

!." #n determining the melting point of a given solid you find that the ,alance point at roomtemperature is !0 cm" The ,alance point shifts continuously to higher values &hen you

start heating the hot +unction slo&ly" But at a certain temperature the ,alance point ,ecomes steady say at 20 cm" 9fter further heating the ,alance point ,egins to shift to

higher values and continues to do so" )hat happens during the steady state(

!" State ?alus$ la& of polarization" )hat happens &hen the polarizer and analyzer are i1

parallel to each other and ii1 perpendicular to each other(

7/23/2019 Quiz2003 Nov


!6" #n ?elde$s e%periment to determine the un-no&n fre'uency of a tunning for- ho& you

ascertain that resonance has occurred( )hat happens if the length of the string is halved()rite do&n the &or-ing formula &ith all the parameters defined"

!8" Dra& a neat optical diagram of the 4e&ton$s ring e%periment" Does the spacing ,et&eenall the rings remain same in the field of vie&( @ustify your ans&er(

!:" )hat is a 4icol prism( /o& does it polarize a ,eam of light( )hat are ordinary ande%traordinary rays(

quiz2003 nov

Documents