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15. A hole is drilled along the earths diameter and
a stone is dropped. When the stone is at centre of earth, it has same ........
Ans : mass (VST-09)
16. In an inductor of inductance L = 100
mH,
a current of I = 10A is flowing. The energy stored in the inductor is .............
Ans : 5 J (VST-08)
17. In the given current distribution, what is the
value of I ?
Ans : 2A (VST-06)
18. In the given circuit, the correct relation
at balanced condition is .........
Ans : P/Q = R/S. (VST-03)
19. On which of the following, the terminal
velocity of a solid ball in a viscous fluid is independent
a) area of cross section
b) height of the liquid
c) density of the ball
d) density of the liquid
Ans :
Height of the liquid (VST-03)
20. A body is projected at an angle  with the horizontal with kinetic energy E. What is
its kinetic energy at highest point ?
Ans : E/2 (TAIEEE-07)
21. If the mass of A = 10 kg. The coefficient of
static friction =0.22, coefficient of kinetic friction =
0.2. Then the mass of B to start the motion is ..........
Ans :
2.2 kg (PMT/PDT-05)
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22. A body of mass m is at rest. Another body
of same mass moving with velocity v makes head on elastic collision with the first body.
After collision, the first body starts to move with
a velocity ..............
Ans : v (TIT-P-02)
23. A spring of spring constant k when
stretched through 1 cm the potential energy is U. If it
is stretched by 4 cm, the potential energy will be ...............
Ans :
16 U (TAIEEE-03)
24. A spring having spring constant k is
extended from x = 0 to x = x1. The work done will
be ..............
Ans :
 (DT-09)
25. A body moving with a constant sped in a
circular path has ...............
Ans : No work done (DT-07)
26. Which has not the same unit as others ?
a) watt sec b) J. sec
c) kwatt hr d) eV
Ans :
J sec. (PMT/PDT-01)
27. The equation of a wave is  . The wavelength of the wave is .................
Ans :
2 units. (VST-P-03)
28. In a transformer, the number of turns in
primary and secondary are 500 and 2000 respectively.
If the current in the primary is 48 A, the current
in the secondary is ...........
Ans :
12 A (VST-05)
29. The following four particles have the
same momentum. Which one has the maximum kinetic energy ?
a) electron b) proton
c) deutron d)  particle
Ans : Electron (VST-02)
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