When a bulb lights up on passing current, the change of energy is

1. from electrical energy to heat energy
2. from electrical energy to light energy
3. from electrical energy to heat and light energy
4. from electrical energy to mechanical energy

The correct statement is

1. Both work and energy have the same units
2. Potential energy of a body is due to its motion
3. Kinetic energy of a body is due to its position or state
4. Kinetic energy can change into potential energy, but potential energy cannot change into kinetic energy

Water is lifted from ground floor to overhead tank at the second floor. The work done is stored in the form of :

1. kinetic energy
2. chemical energy
3. potential energy
4. both kinetic energy and chemical energy

Assertion (A): Mechanical energy of a freely falling body increases as it falls.

Reason (R): Potential energy is converted into kinetic energy during free fall.

1. Both A and R are true and R is the correct explanation of A
2. Both A and R are true and R is not the correct explanation of A
3. A is true but R is false
4. A is false but R is true