First slide

Magnetic Flux

Question

The magnetic flux $ϕ$ (in Weber) in a closed circuit of resistance $10 Ω$ varies with time t (in second) according to equation $ϕ = 6 t^{2} - 5 t + 1$ . The magnitude of induced current at t = 0.25sec is

Easy

A

1.2 A
B

0.8A
C

0.6A
D

0.2 A

Solution

$e = \frac{d ϕ}{d t} = 12 t - 5$
$I = \frac{e}{R} = |\frac{12 (0.25) - 5}{10}| = 0.2 A$

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