Question

mention the condition under which charges can move in a cconductor.name the device which is used to maintain this condition in an eletric circuit

Answer 1

Electric current I:
Is defined as the rate of flow of charge .
I=q/t
S.I unit of electric current is Ampere.

Charges can move in a conductor :
1. If the electric circuit is closed.
2. If there is a potential difference along the conductor.

Electric cell or battery consisting of one or more cells is used to maintain the potential difference in a circuit

Answer 2

The condition under which charges can move in a conductor are the charges in which there is a potential difference.

A 12-volt battery would supply 12 Joules of electric potential vitality per each 1 Coulomb of charge which moves between its negative and positive terminals. The proportion of the adjustment in potential energy to charge is 12:1. In this manner, 24 Joules would be the distinction in potential vitality for 2 Coulombs of charge.

And the devices which are used to maintain the condition in an electric circuit are cells and batteries.