Define electric power.

(a) Calculate the resistance of the wire using the graph. (b) How many 176Omega resistors in parallel are required to carry 5A on a 220 V line? (c ) Define electric power. Derive relation between power, potential difference and resistance.

(a) Calculate the resistance of the wire using the graph. (b) How many 176Omega resistors in parallel are required to carry 5A on a 220 V line? (c ) Define electric power. Derive relation between power, potential difference and resistance.

Define the term electric power. Write an expression for it.

Define electrical energy and electrical power. Give their respective SI unit also.

Define electrical energy and electrical power. Give their respective SI unit also.

The efficiency of a motor is defined as the ratio of mechanical power output to that with input electric power. The motor is designed to operate at 100 V and it draws a current of 15 A . If output mechanical power of motor is 800 W, then calculate the efficiency of motor .