Free MCQs & Online Quiz Practice for Exams

Q: The efficiency of a transformer which draws a power of 20 watt is 60% the power supplied by it is: (Entry test 2015)

A) 5 W

B) 1.2 W

C) 6 W

D) 12 W

Q: Resistive forces are: (Entry test 2010)

A) Non-conservative

B) Conservative

C) Both a and b

D) None

Q: The dot product of force and velocity is equal to: (Entry test 2011)

A) Power

B) impulse

C) couple

D) momentum

Q: The escape velocity from the earth's gravitational field depends upon: (Entry test 2011)

A) rotation of the earth

B) mass of the body

C) radius of the earth

D) distance from the earth

Q: If the velocity of a body becomes half, the kinetic energy of the body becomes: (Entry test 2011)

A) One fourth

B) double

C) four times

D) half

Q: A force of 6 N acts horizontally on a stationary mass of 2 kg for 4 s. The kinetic energy in joule is: (Entry test 2009)

A) 72

B) 12

C) 144

D) 48

Q: The two bodies with masses m1 and m2 have equal kinetic energies. If m1 and m2 are their respective momenta then the ratio between m1 and m2 is: (Entry test 2009)

A) m2:m1

B) m2²:m2

C) m1:m2

D) m1²:m2

Q: Light and heavy bodies have equal kinetic energies. Which one has the greater momentum? (Entry test 2009)

A) heavy body

B) light body

C) both a and b

D) none

Q: A 6.0-kg block is released from rest 80 m above the ground. When it has fallen 60 m, its kinetic energy is approximately: (Entry test 2009)

A) 4800 J

B) 3500 J

C) 1200 J

D) 120 J

Q: The weight of a pilot diving down with an acceleration of 9.8 m/sec² will become: (Entry test 2011)

A) Double

B) Half

C) Zero

D) Negative

Q: The unit of angular momentum in SI system is: (Entry test 2007)

A) kg·m

B) kg·m²/kg

C) kg·m²/s

D) kg²·s

Q: For what value of angle θ must a curve be banked to prevent skidding at 90 km/h if the radius is 100 m? (Entry test 2015)

A) 15°

B) Entry test 20°

C) 32°

D) 40°

Q: A sphere, disc and hoop of equal radius are released from the top of the inclined plane of height h. Which statement is correct? (Entry test 2005)

A) The disc will reach first

B) Sphere will reach first

C) Hoop will reach first

D) They reach simultaneously

Q: A curve of radius 150 m on a motorway is banked at 30°. What is the maximum speed a car can turn without skidding? (Entry test 2010)

A) 10 m/s

B) 19 m/s

C) 29 m/s

D) 35 m/s

Q: A body weighs 72 kg on the surface of the earth. Its weight on the moon will be: (Entry test 2010)

A) 72 kg

B) 12 kg

C) 24 kg

D) 0 kg

Q: When a body moves in a circle, the angle between its linear velocity v and angular velocity ω is always: (Entry test 2010)

A) 0°

B) 180°

C) 360°

D) 90°

Q: A body moving in a circle of radius r with variable speed has what acceleration? (Entry test 2010)

A) centripetal

B) tangential

C) angular

D) all of the above

Q: The ratio of inertial mass to gravitational mass is equal to: (Entry test 2010)

A) 1/2

B) 1

C) 2

D) no fixed number

Q: An object in a satellite orbiting Earth is weightless because: (Entry test 2009)

A) g=0

B) no force acts on it

C) its motion is free fall

D) it is far from Earth

Q: Centripetal force is F for radius r. If radius becomes r/2, percentage change in centripetal force is: (E.T 2012)

A) 300%

B) 100%

C) 400%

D) 200%