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Related Questions

• A transformer is employed to reduce 220 V to 11 V. The primary draws a current of 5 A and the secondary 90 A. The efficiency of the transformer is

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• The magnetic flux linked with a coil at any instant ‘t’ is given by $\phi = 5t^3 – 100t + 300$, the e.m.f. induced in the coil at t = 2 second is

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• A conducting square loop of side l and resistance $R$ moves in its plane with a uniform velocity v perpendicular to one of its sides. A magnetic induction B constant in time and space, pointing perpendicular and into the plane at the loop exists everywhere with half the loop outside the field, as shown in figure. The induced e.m.f. is

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• The alternating voltage induced in the secondary coil of a transformer is mainly due to

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• In a circular conducting coil, when current increases from 2 A to 18 A in 0.05 sec., the induced e.m.f. is 20 V. The self inductance of the coil is

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