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

The device used to produce electric current is known as

Which one of the following terms cannot represent electrical power in a circuit?

Who amongst the following is a pioneer in discovering the heating effect of electric current ?

In an electric circuit, a wire of resistance 10 Ω is used. If this wire is stretched to a length double of its original value, the current in the circuit would become :

The heating element in an electric iron is usually made of