220 V 50 Hz Ac Is Applied To Resistor

220 V, 50 Hz, ac is applied to a resistor. The instantaneous value of voltage is (a) 220√2 sin 100π t ( … (c) 220√2 sin 50π…

Answers:

The correct option (a) 220√2 sin 100π t 

Explanation:

V = Vm sin ωt

Vm   = Vrms × √2 = 220 × √2 V

 ω = 2πf = 2π × 50 = 100 π

∴ V   = 220√2 sin 100π t