West Bengal Police Constable Special Mock Test

Physics - Work Power Energy

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

A) Joule

B) Newton

C) Watt

D) Pascal

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

A) Natural gas

B) Nuclear

C) Coal

D) Solar

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

A) Law of Gravity

B) Law of Thermodynamics

C) Law of Motion

D) Law of Conservation of Energy

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

A) Chemical energy

B) Electrical energy

C) Mechanical energy

D) Thermal energy

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

A) The speed at which an object travels

B) The distance an object moves

C) The energy transferred to an object via force

D) The amount of force applied

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

A) Sun

B) Geothermal

C) Biomass

D) Wind

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8) 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) 3500 J

B) 2450 J

C) 4900 J

D) 1750 J

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

A) A moving car

B) Water held behind a dam

C) A compressed spring

D) A raised weight

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

A) Thermal energy

B) Nuclear energy

C) Kinetic energy

D) Chemical energy

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Curriculum

Physics (Work Power Energy কার্যক্ষমতা শক্তি)

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