Question

An electric current produces a heating effect but not a magnetic effect.

• A. True
• B. False

Answer 1

The correct option is B False

Electric current:

1. Electric current is the rate at which electrons travel across a conductor.
2. The Ampere is the SI unit of electric current.

Explanation:

1. An electric current produces a heating effect as well as a magnetic effect.
2. When an electric current is passed through a conductor, it generates heat due to the hindrance caused by the conductor to the flowing current.
3. The work done in overcoming the hindrance to the current generates heat in that conductor.
4. Hence the heating effect produced by an electric current, $I$ through a conductor of resistance, $R$ for a time, $t$ is given by

$H=I^{2}Rt$ This equation is the Joule's equation of electrical heating.

The magnetic field produced by an electric current can be observed while placing a compass near a current-carrying conductor.

1. It can be observed in the figure that the compass needle gets deflected when the current is passed through the circuit.
2. This is because of the magnetic field created by the current.

So, an electric current produces both heating and magnetic effect around it.

Hence, the given statement is false.