West Bengal Police Constable Special Mock Test

Physics - Work Power Energy

1 / 10

1) What is the primary source of energy for the Earth?

A) Biomass

B) Sun

C) Wind

D) Geothermal

2 / 10

2) What type of energy is stored in a battery?

A) Chemical energy

B) Kinetic energy

C) Nuclear energy

D) Thermal energy

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3) In a perfectly elastic collision, two bodies of masses m1 and m2 collide. If their initial velocities are u1 and u2 respectively, what is the relation between their final velocities v1 and v2?

A) u1 + u2 = v1 + v2

B) m1*v1^2 + m2*v2^2 = m1*u1^2 + m2*u2^2

C) v1 - v2 = u1 - u2

D) m1*u1 + m2*u2 = m1*v1 + m2*v2

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4) What does the term 'work' refer to in physics?

A) The amount of force applied

B) The speed at which an object travels

C) The distance an object moves

D) The energy transferred to an object via force

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5) What is the unit of work in the International System of Units?

A) Pascal

B) Watt

C) Joule

D) Newton

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6) A cyclist of mass 70 kg is traveling at a speed of 5 m/s. How much additional work is needed to increase the speed to 10 m/s?

A) 4900 J

B) 2450 J

C) 3500 J

D) 1750 J

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7) What is the main form of energy produced by a car engine?

A) Thermal energy

B) Mechanical energy

C) Chemical energy

D) Electrical energy

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8) Which of the following is a renewable energy source?

A) Natural gas

B) Nuclear

C) Solar

D) Coal

9 / 10

9) Which law states that energy cannot be created or destroyed?

A) Law of Motion

B) Law of Thermodynamics

C) Law of Conservation of Energy

D) Law of Gravity

10 / 10

10) Which of the following is NOT an example of potential energy?

A) A raised weight

B) A moving car

C) A compressed spring

D) Water held behind a dam

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Curriculum

Physics (Work Power Energy কার্যক্ষমতা শক্তি)

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