An electric lamp is connected to 220 V, 50 Hz supply. Then the peak voltge is

Options

(a) 210 V
(b) 211 V
(c) 311 V
(d) 320 V

Correct Answer:

311 V

Explanation:

Measurement of A.C voltage gives the rms values.
V(rms) = 220 V
Peak value Vm = V(rms) √2 = √2 (220 V) = 311 V.