Energy and Units MCQ (Multiple Choice Questions) PDF Download

In order to do work, energy is

1. transferred or converted
2. used up
3. lost
4. lost or transferred

Pendulum bob stops moving when all its original gain in gravitational potential energy has been converted to

1. Sound Energy
2. Thermal Energy
3. Light Energy
4. Kinetic Energy

An object of mass 'm' raised to a height '2h' above the ground level possesses a gravitational potential energy of

1. 1 ⁄ 2 × mgh
2. mgh
3. 2mgh
4. m × g ⁄ 2h

Knocking a nail into a wooden block with a hammer involves conversion between different forms of energy, which of the following choices present this conversion in correct order.

1. chemical energy → gravitational potential energy → kinetic energy → (sound energy + heat energy)
2. chemical energy → kinetic energy → gravitational potential energy → (sound energy + heat energy)
3. chemical energy → (sound energy + heat energy) → kinetic energy → gravitational potential energy
4. (sound energy + heat energy) → chemical energy → kinetic energy → gravitational potential energy

Wind and waves are used by the turbines to convert

1. Mechanical Energy into Electrical Energy
2. Kinetic Energy into Electrical Energy
3. Potential energy into Kinetic Energy
4. Potential Energy into Electrical Energy