# If the voltage in an ac circuit is represented by the equation. V = 220√2sin (314t – φ) volt .calculate …

Q: If the voltage in an ac circuit is represented by the equation.
$\large V = 220 \sqrt{2}sin(314t -\phi)$ volt . calculate (a) peak and rms value of the voltage (b) average voltage (c) frequency of ac.

Sol: (a) As in case of ac,

$\large V = V_0 sin(\omega t -\phi)$

The peak value is V0 = 220 √2 = 311 V

Vrms = V0/√2; Vrms = 220 V ;

(b) In case of ac

Vavg = 2V0/π = 198.17V

(c) As ω = 2πf , 2πf = 314

i.e., f = 314/2π = 50 Hz.