Electrical power P is given by the expression P = $\dfrac{(Q × V)}{\text{time}}$.

(a) What do the symbols Q and V represent?

(b) Express the power P in terms of current and resistance explaining the meaning of symbols used there in.

Name the S.I. unit of electrical energy. How is it related to Wh?

(i) State and define the household unit of electricity.

(ii) What is the voltage of the electricity that is generally supplied to a house?

(iii) What is consumed while using different electrical appliances, for which electricity bills are paid?

Define the term kilowatt-hour and state it's value in S.I. unit.