MCAT MCQ Quiz Hub

1. Work done by variable force is determine by dividing
force into small interval
displacement into small interval
both force and displacement into small intervals
force into small and displacement into large intervals

2. Work done on the body equals to the
change in its K.E always
change in its P.E always
change in its K.E and change in its P.E
neither change in K.E and nor change in its P.E

3. The escape velocity of a body in gravitational field of earth is independent of
its mass
the angle at which it is thrown
both its mass and the angle at which it is thrown
gravitational field of earth

4. The tides raise the mater in the see roughly in a day
once
twice
four time
eight time

5. The source of geothermal energy is
decay of radioactive element in the earth
compression of material in the earth
residual lost of the earth
all as said in a - b and c

6. The highest value of escape velocity in solar system is planet
Earth
Neptune
Jupiter
Moon

7. Work done by the force of friction is
always positive
always negative
positive only for small frictional force
positive only for large frictional force

8. Gravitational P.E of a body has
no formula
a formula mgh only
a formula
no general formula

9. If velocity is doubled then
momentum increases 4 times and K.E increases 2 times
momentum and K.E. remain same
momentum increases 2 times and K.E increases constant
momentum increases 2 times and K.E increases 4 time

10. When the speed of a moving body is doubled then
its K.E is doubled
its acceleration is doubled
ts P.E is doubled
its momentum is doubled

11. One mega watt hour is equal to
36 x 106 J
36 x 1012 J
36 x 109 J
36 x 108 J

12. Which of the following is not conservative force
friction
electric
gravitational
magnetic

13. Work has the dimension as that of same as that of
torque
angular momentum
linear momentum
power

14. The consumption of energy by a 60 watt bulb in 2 sec is
120 J
60 J
30 J
0.02 J

15. The relation between the escape velocity V esc and orbital speed Vo is given by
V esc = 1/2Vo
V esc = ?2 Vo
V esc = Vo
V esc = 2Vo

16. The escape velocity form the earth surface in km S-1 is
4.2 km S-1
7.5 km S-1
9.5 km S-1
1.1 km S-1

17. If moon radius is 1600 km and g on its surface is 1.6 ms-2 then the escape velocity on the moon is
1600 ms-1
50.6 ms-1
71.6 ms-1
2263ms-1

18. When two protons are brought together
Kinetic energy increases
P.E. between them increases
P.E. between them decreases
P.E. between tem does not change

19. When arrow is released form its bow, its energy is transformed from
heat energy to K.E
elastic P.E to K.E
elemical energy to elastic P.E
K.E to elastic P.E.

20. A man lifts vertically a weight of 40kg through 1m in 10s; while a chile lifts vertically a weight of 10kg through a distance of 1m in 1s. What will be correct inference?
man does more work than child
child does more work than man
both do the same amount of work
it is a foolish question

21. The work done by friction is
positive
negative
zero
none of these

22. The area under the force displacement graph represents
area
work done
power
none of these

23. The dimension of power is
[ML2T-3]
[ML2T-2]
[ML2T3]
none of these

24. Propulsion force of a rocket is
non-conservative force
conservative force
both (a) and (b)
non of these

25. The dot product of force and velocity is
power
work
impulse
torque

26. Geothermal energy is a ____________________ source of energy.
non-renewable
stable
renewable
none of the above

27. The source of tidal energy is
sun
earth
both (a) and (b)
moon

28. ________________ cells converts solar energy into electrical energy
rotory
photovoltaic
galvanic
non of these

29. On a clear day at noon the solar energy reaching the earth is
1.44kw/m2
1.4kw/m2
1 kw/m2
none

30. Biomass can be converted into fuels by
direct combustion
fermentation
both (a) and (b)
none of these

31. In vibratory motion
P.E. remains constant
K.E. remain constant
total energy remain constant
total momentum remain constan

32. The waveform of S.H.M. is
standing wave
sine wave
square wave
none

33. S.I unit of frequency is
vibration S-2
radian
hertz
ms-1

34. In S.H.M. the velocity of a particle is maximum at
mean position
extreme position
middle between mean and extreme position on the right side
middle between mean and extreme position on the left side

35. The acceleration of a projection on the diameter for a particle moving along a circle is
w2x
wx2
w2x
wx2

36. Total energy of a body executing S.H.M is directly proportional to
square root of amplitude
the amplitude
reciprocal of amplitude
square of amplitude

37. The time period of a second pendulum is
4 seconds
3 seconds
2 seconds
6 seconds

38. The length of second pendulum is
100 cm
99 cm
99.2 cm
98 cm

39. If length of second pendulum becomes four times, then its time period will become
four times
six times
eight times
two times

40. The force responsible for the vibratory motion of the simple pendulum is
mg cos?
mg sin?
mg ton?
mg

41. The frequency of the second pendulum is
1 hertz
0.5 hertz
1.5 hertz
2.5 hertz

42. Simple harmonic motion is a type of
rotational motion
circular motion
musical arrangement
vibratory motion

43. The SI unit of force constant is identical with that of
force
pressure
surface tension
loudness

44. When the amplitude of a wave become double its energy become
double
four times
one half
none time

45. A simple pendulum suspended form the ceiling of a lift has time period T when the lift is at rest. When the lift falls freely, the time period is
infinite
T/g
zero
g/T

46. The energy of SHM is maximum at
mean position
extreme position
in between mean and extreme
all positions during SHM

47. The product of frequency and time period is equal to
1
2
3
4

48. The displacement of SHM is written as X = X? sin?t if displacement is written by X = X? son ?t then phase constant will be equal to
0?
45?
90?
180?

49. For what displacement the P.E becomes 1/4 of its maximum value?
x = x?
x = x?/2
x = x?/4
x = x?2/2