First slide

Alternating Current and voltage

Question

A generator produces a voltage that is given by $V = 240 \sin 120 t$ , where t is in seconds. The frequency and r.m.s. voltage are

Moderate

A

60 Hz and 240 V
B

19 Hz and 120 V
C

19 Hz and 170 V
D

754 Hz and 70 V

Solution

$ν = \frac{ω}{2 π} = \frac{120 \times 7}{2 \times 22} = 19 Hz$
$V_{r m s} = \frac{240}{\sqrt{2}} = 170 V$

Get Instant Solutions

When in doubt download our app. Now available Google Play Store- Doubts App

Recieve an sms with download link

Doubts App

OR

SCAN ME

Doubts App

Doubts App