Energy Quiz

Consider the following statements:

1) An incandescent bulb converts electric energy to light and heat energy.

2) A light-emitting diode (LED) converts light energy to electrical energy.

Which of the statements given above is/are correct?

Which of the following devices converts mechanical energy into sound energy?

What is the SI unit of heat?

One feels heavier in a lift when the lift

The value of the work will be maximum only when the angle between the displacement and the direction of force is equal to-