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A thin circular ring of area `A` is perpendicular to uniform magnetic field of induction `B`. `A` small cut is made in the ring and a galavanometer is connected across the ends such that the total resistance of circuit is `R`. When the ring is suddenly sqeezed to zero area, the charge flowing through galvanometer is:A. `(BR)/(A)`B. `(AB)/(R )`C. `ABR`D. `(B^(2)A)/(R^(2)` |
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Answer» Correct Answer - B `Q=(Ndeltaphi)/(R )=(phi_(2)-phi_(1))/(R )=(BA-0)/(R )=(BA)/(R )` |
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