Question

(a) What is an electric current ? What makes an electric current flow in a wire ?
(b) Define the unit of electric current (or Define ampere).

Answer 1

Explanation:

(a) An electric currrent is a flow of electric charges (electrons) through a conductor.

Potential difference between the ends of the wire makes electric current to flow in the wire.

(b) When 1 coulomb of charge flows through any cross-section of a conductor in 1 second, the electric current flowing through it is said to be 1 ampere.

Answer 2

Electric Current : Electric Current is the directed flow of electric charges. The strength of the electric current is measured by the net charge flowing across a certain area per unit time

S.I unit of Current : S.I unit (International System of Unit) of Current is Ampere (A), named in the honor of French scientist Andre Marie Ampere (1775 - 1836)