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Quiz 3
Mdcat-past-papers - SZABMU - Physics Quiz
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Board: SZABMU | Subject: Physics |
41. The unit of power in British engineering system is:
Horsepower
Watt
J•s⁻¹
J•s
42. A motor boat is moving with velocity 4 m/s. The net force acting on it is 1000 N. What will be the power of engine of boat?
1000 W
160 W
16kW
1600 W
43. Power is dot product of:
Force and displacement
Force and velocity
Force and time
Work and time
44. A car of mass 800Kg accelerates from 20 to 30ms⁻¹. Increase in K.E is:
2J
200KJ
200J
2KJ
45. Kilowatt hour is a unit of:
Energy
Energy × time
Power
(power)(energy)
46. According to work-energy principle in linear motion, work done =
Change in P.E
Sum of P.E + K.E
Change in K.E
Zero
47. If mass 'm' accelerated on smooth horizontal surface 'S' by force 'F', work F×S is converted into:
Heat energy
Kinetic energy
Potential energy
Electromagnetic
48. One Megawatt hour equals:
3.6 × 10⁶J
3.6 × 109J
3.6 MJ
3.5 mJ
49. One of the following is a non-conservative force:
Electric force
Normal force
Elastic spring force
Gravitational force
50. In energy inter-conversion, work done against friction is:
Ef
fh
mgh
f/h
51. How many radians are in one degree?
0.0174 rad
0.174 rad
1.745 rad
0.00174 rad
52. Which one of the following is the angular velocity of an electric motor if it is revolving at 400 rpm?
51.2 rad/s
41.9 rad/s
45.2 rad/s
38.5 rad/s
53. Which one of the following is angular speed in radian per hour for daily rotation around our earth?
2π
4π
π/6
π/12
54. In angular motion, in one rotation there are:
π radians
2π radians
π/2 radians
π/4 radians
55. The number of revolutions per second of a body is known as:
Linear frequency
Angular frequency
Time period
Amplitude
56. The relation between linear and angular acceleration is:
a – r
a – r/a
a = rα
A = rα²
57. In case of angular displacement, one radian is equal to:
60 degrees
57.3 degrees
360 degrees
90 degrees
58. The relationship between linear displacement and angular displacement is:
θ = sr
s = rθ
s = r/θ
θ = r/s
59. The centripetal force in terms of angular velocity is given by:
Fc = mrω
Fc = mrω²
Fc = mrα
Fc = mrα
60. Which one of the following provides centripetal force in a circular motion of the body?
Vertical component of weight
Horizontal component of weight
Weight of the body
Force of friction
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