A bar magnet is passing through a conducting loop of radius R with velocity $\upsilon .$  The radius of the bar magnet is such that it just passes through the loop. The induced e.m.f. in the loop can be represented by the approximate curve:

<p>Emf = <span contenteditable="false"> <math> <mrow> <mfrac> <mrow> <mo>−</mo> <mi>d</mi> <mi>? </mi> </mrow> <mrow> <mi>d</mi> <mi>t</mi> </mrow> </mfrac> </mrow> </math> </span><math><mrow><mfrac><mrow></mrow><mrow></mrow></mfrac></mrow></math></p><p>When magnet passes through the centre rogion of loop, no emf is induced and the polarity of emf will be negative while entering the loop.</p>

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