The device used to produce electric current is known as

The instrument used for detecting the presence of electric current in a circuit is

A fuse is used in main electric supply as a safety device. Which one of the following statements about the fuse is correct?

An electric bulb is connected to 220 V generator. The current drawn is 600 mA. What is the power of the bulb?

An electric bulb is connected to a 110 V generator. The current is 0.2 A. What is the power of the bulb?

If potential difference and current flowing through a wire is increased twice each then electric power :