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Electromagnetic Induction — Physics STD 12 Science — Question

Rajasthan BoardEnglish MediumSTD 12 SciencePhysicsElectromagnetic Induction2 Marks
Question
Figure shows a conducting square loop placed parallel to the pole faces of a ring magnet. The Pole$-$faces have an area of $1\ cm^2 $ each and the field between the poles is $0.10T$. The wires making the loop are all outside the magnetic field. If the magnet is removed in $1.0s$, what is the average emf induced in the loop?
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Answer

$\text{B}=0.10\text{T}$
$\text{A}=1\text{cm}^2=10^{-4}\text{m}^2$
$\text{T}=1\text{s}$
$\phi=\text{B}.\text{A=}10^{-1}\times10^{-4}=10^{-5}$
$\text{e}=\frac{\text{d}\phi}{\text{dt}}=\frac{10^{-5}}{1}=10^{-5}=10\mu\text{V}$

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