Ncert Exercises & Solutions

Question 7.1 :

A 100 Ω resistor is connected to a 220 V, 50 Hz ac supply.

(a) What is the rms value of current in the circuit?

(b) What is the net power consumed over a full cycle?

The resistance of the resistor, R = 100 $Ω$ , Supply voltage, V = 220V, Frequency, v = 50 Hz

(a) The rms value of current in the circuit is given as

$I = \frac{V}{R} = \frac{220}{100} = 2.20 A$

(b) The net power consumed over a full cycle is given as: P = VI = 220 x 2.2 = 484 W