Mention the condition under which charges can move in a conductor. Name the device which is used to maintain this condition in an electric circuit. (b) A current of 2A passes through a circuit for 1 minute. IF potential difference between the terminals of the circuit is 3V, what is the work done is transferring the charge?

Mention the condition under which charges can move in a conductor. Nam

1.	Mention the condition under which charges can move in a conductor. Name the device which is used to maintain this condition in an electric circuit. (b) A current of 2A passes through a circuit for 1 minute. IF potential difference between the terminals of the circuit is 3V, what is the work done is transferring the charge?
Answer» Solution :Electric charges can MOVE in a conductor when a potential DIFFERENCE is maintained ACROSS its ends. As electric cell is used to maintain potential difference across the conductor and thus can be used for flow of charges (i.e., flow of current) (b) Here I=2A time t=1 MINUTE =60s and V=30V `therefore` Total charge flowing `q=It=2 times 60=120 C` `therefore` Work done `W=qV=120 times 3=360 J`