Question 274: Electromagnetic Induction

Question

A magnetic field of $$2 	imes 10^{-2} \mathrm{~T}$$ acts at right angles to a coil of area $$100 \mathrm{~cm}^2$$ with 50 turns. The average e.m.f. induced in the coil is $$0.1 \mathrm{~V}$$, when it is removed from the field in time '$$t$$'. The value of '$$t$$' is

Accepted Answer

$$\begin{aligned}
& \mathrm{e}=-\frac{\mathrm{d} \phi}{\mathrm{dt}}=-\frac{\left(\phi_2-\phi_1ight)}{\mathrm{t}}=-\frac{(0-\mathrm{NBA})}{\mathrm{t}} \
	herefore \quad 0.1 & =\frac{50 	imes 2 	imes 10^{-2} 	imes 10^{-2}}{\mathrm{t}}
\end{aligned}$$
$$	herefore \quad$$ The value of '$$t$$' is,
$$\qquad\mathrm{t}=\frac{10^{-2}}{0.1}=0.1 \mathrm{~s}$$

Answer

$$2 	imes 10^{-3} \mathrm{~s}$$

Answer

$$0.5 \mathrm{~s}$$

Answer

$$0.1 \mathrm{~s}$$

Answer

$$1 \mathrm{~s}$$

Electromagnetic Induction

A magnetic field of $2 \times 10^{-2} \mathrm{~T} acts at right angles to a coil of area 100 \mathrm{~cm}^2 with 50 turns. The average e.m.f. induced in the coil is 0.1 \mathrm{~V}, when it is removed from the field in time 't'. The value of 't$' is

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