Ch-12 Electricity (Question) Page202

Question 1:	Name a device that helps to maintain a potential difference across a conductor.
Answer :	A source of electricity such as cell, battery, power supply, etc. helps to maintain a potential difference across a conductor.
Question 2:	What is meant by saying that the potential difference between two points is 1 V?
Answer :	If 1 J of work is required to move a charge of amount 1 C from one point to another, then it is said that the potential difference between the two points is 1 V.
Question 3:	How much energy is given to each coulomb of charge passing through a 6 V battery?
Answer :	The energy given to each coulomb of charge is equal to the amount of work required to move it. The amount of work is given by the expression, Potential difference = Where, Charge = 1 C Potential difference = 6 V Therefore, 6 J of energy is given to each coulomb of charge passing through a battery of 6 V.