Electromagnetic Induction Ques 8
8. A magnetic field of $2 \times 10^{-2}$ $ T$ acts at right angles to a coil of area $100 $ $cm^{2}$, with $ 50 $ turns. The average e.m.f. induced in the coil is $0.1$ $ V$, when it is removed from the field in $t$ $sec$. The value of $t$
[1991]
(a) $10$ $ s$
(b) $0.1$ $ s$
(c) $0.01$ $ s$
(d) $1$ $ s$
Show Answer
Answer:
Correct Answer: 8.(b)
Solution:
- (b) $e=\frac{-(\phi_2-\phi_1)}{t}=\frac{-(0-N B A)}{t}=\frac{N B A}{t}$
$t=\frac{N B A}{e}=\frac{50 \times 2 \times 10^{-2} \times 10^{-2}}{0.1}=0.1$ $ s$
BETA
