Question

Define the following:
(a) $1$ volt PD.
(b) Electric power.

Answer 1

(a) 1 volt PD: Electric potential or potential difference between two points is said to be of 1 volt if 1 Joule of work is done on 1 Coulomb of charge from one point to another.
(b) Electric power: Electric power is defined as the rate of doing work in maintaining electric current in an electric circuit. It is denoted by P.