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The flux linked with a large circular coil, of radius R, is 0.5 xx 10^(-3) Wb when a current of 0.5 A flows through a small neighbouring coil of radius'r'. Calculate the mutual inductance for the given pair of coils. If the current through the small coil suddenly falls to zero, what would be its effect in the larger coil ? |
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Answer» Solution :Here I= 0,5 A and `phi_(2) = 0.5 xx 10^(-3) Wb` `therefore M = (phi_(2))/I_(1) = (0.5 xx 10^(-3) Wb)/(0.5A) = 10^(-3)` H or 1 mH If current through the smaller coil suddenly FALLS to zero, an instantaneous EMF is produced in the larger coil on account of MUTUAL inductance. |
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