Scholarship Test Worksheet With Answer Key - Target Pmt Page 3
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ST/SP/20152016/IPOY
13. A system is taken from state A to state B along two different
20. A body executes S.H.M. with an amplitude A. At what
paths 1 and 2. The work done of the system along these two
displacement from the mean position is the potential energy
paths is W
and W
respectively. The heat absorbed by the
of the body is one fourth of its total energy?
1
2
system along these two paths is Q
and Q
respectively. The
(1) A/4
1
2
internal energy at A and B is U
and U
respectively.
(2) A/2
A
B
(1) W
= W
= U
– U
(3) 3A/4
1
2
B
A
(2) Q
= Q
= U
– U
(4) Some other fraction of A
1
2
A
B
(3) Q
+ W
= Q
+ W
= U
+ U
1
1
2
2
A
B
21. The speed of a wave in a medium is 960 m/s. If 3600 waves
(4) Q
– W
= Q
– W
= U
– U
are passing through a point in the medium in 1 min, then the
1
1
2
2
B
A
14. A cylindrical tube, open at both ends, has fundamental
wavelength of the wave is
frequency f in air. The tube is dipped vertically in water so
(1) 8 m
(2) 12 m
that half of it in water. The fundamental frequency of air
(3) 16 m
(4) 20 m
column is now :
22. First law of thermodynamics is consequence of conservation
f
3f
of
(1)
(2)
2
4
(1) Work
(2) Energy
(3) f
(4) 2f
(3) Heat
(4) All of these
15. The angle between A and B is q. The value of the triple
23. The efficiency of a Carnot engine operating between the
temperature of 100°C and –23°C will be
product A B A
is
.(
´
)
100 23
+
(1)
(1) A B
2
(2) Zero
100
2
2
100 23
-
(3) A B
(4) A B
sin q
cos q
(2)
100
16. The vectors A and B are such that
373 250
+
(3)
|
A B
+
| |
=
A B
-
|
373
The angle between the two vectors is
373 250
-
(4)
(1) 60°
(2) 75°
373
(3) 45°
(4) 90°
24. A black body has maximum wavelength l
at temperature
17. A shell is fired from a cannon, it explodes in mid air, its total
m
2000 K. Its corresponding wavelength at temperature
(1) Momentum increases (2) Momentum decreases
3000 K will be
(3) K.E. increases
(4) K.E. Decreases
3
2
l
l
18. The centre of mass of a system of particles does not depend
(1)
(2)
m
m
2
3
upon
4
9
(1) Masses of the particles
l
l
(3)
(4)
m
m
9
4
(2) Forces acting on the particles
(3) Position of the particles
25. A particle of mass M is moving in a horizontal circle of
radius R with uniform speed V. When it moves from one
(4) Relative distances between the particles
point to a diametrically opposite point, its
19. The velocity of sound in any gas depends upon
2
(1) Kinetic energy change by MV
/4
(1) Wavelength of sound only
(2) Density and elasticity of gas
(2) Momentum does not change
(3) Intensity of sound waves only
(3) Momentum changes by 2 MV
(4) Amplitude and frequency of sound
2
(4) Kinetic energy changes by MV
Space Fo r Ro ugh Wo rk
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