A conducting circular loop is placed in a uniform magnetic field, `B=0.025T` with its plane perpendicular to the loop. The radius of the loop is made to shrink at a constant rate of `1 mms^(-1)`. The induced emf when the radius is `2 cm` isA. `2pi mu V`B. `pimuV`C. `(pi)/2 mu V`D. `2muV`

A conducting circular loop is placed in a uniform magnetic field, `B=0

1.	A conducting circular loop is placed in a uniform magnetic field, `B=0.025T` with its plane perpendicular to the loop. The radius of the loop is made to shrink at a constant rate of `1 mms^(-1)`. The induced emf when the radius is `2 cm` isA. `2pi mu V`B. `pimuV`C. `(pi)/2 mu V`D. `2muV`
Answer» Correct Answer - B Magnetic flux `phi=B.A =B pi r^(2)` `EMF \|e\| =(dphi)/(dt)=Bpi2r (dr)/(dt) =pimuV`

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A conducting circular loop is placed in a uniform magnetic field, `B=0.025T` with its plane perpendicular to the loop. The radius of the loop is made to shrink at a constant rate of `1 mms^(-1)`. The induced emf when the radius is `2 cm` isA. `2pi mu V`B. `pimuV`C. `(pi)/2 mu V`D. `2muV`

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