Which one of the following does not convert electrical energy into light energy?
A candle
Some examples of energy conversion:
| Microphone | A device that converts sound waves into forms of electrical energy. |
| Loudspeaker | A device that converts electrical signals into a sound that is loud enough to be heard at a distance. |
| Solar Cell | A device that directly converts light energy into electricity through the photovoltaic effect. |
| Gramophone | A device used for recording sound and playing it back. |
A 100 W electric bulb is used for 10 hours a day. How many units of energy are consumed in 30 days?
The following diagram shows a pendulum at different positions. Which one of the following statement is true?

If an object of mass 10 kg is moving with a uniform speed of 10 m/s, then the linear momentum and the kinetic energy of the object, respectively, are
Which of the following is NOT correct regarding friction?
If a pump can raise 200 liters of water through a height of 300 meters in one minute, how much work can it do in one hour?
Which of the following is an example of kinetic energy?
How much kinetic energy does a 160 g cricket ball have when it is thrown at a speed of 22 m/s?
The movement of birds is an example of _______.