First slide

Magnetic flux and induced emf

Question

The coil of area 0.1 m² has 500 turns. After placing the coil in a magnetic field of strength $4 \times 10^{- 4} Wb / m^{2}$ , if rotated through 90^o in 0.1 s, the average emf induced in the coil is

Moderate

A

0.012 V
B

0.05 V
C

0.1 V
D

0.2 V

Solution

$\begin{array}{l} e = \frac{- NBA (\cos θ_{2} - \cos θ_{1})}{Δt} \\ = - \frac{500 \times 4 \times 10^{- 4} \times 0 .1 (\cos 90 - \cos 0)}{0 .1} = 0 .2 V \end{array}$

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