Question:
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 is
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 is
Updated On: Jul 19, 2024
- 10 s
- 0.1 s
- 0.01 s
- 1 s
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The Correct Option is B
Solution and Explanation
$\in=\frac{-(\phi_2-\phi_1)}{t}=\frac{-(0-NBA)}{t}=\frac{NBA}{t}$
$t=\frac{NBA}{\in}=\frac{50\times2\times10^{-2}\times10^{-2}}{0.1}=0.1 \, s$
$t=\frac{NBA}{\in}=\frac{50\times2\times10^{-2}\times10^{-2}}{0.1}=0.1 \, s$
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