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Related Questions

• A coil has an area of 0.05 m2 and it has 800 turns. It is placed perpendicularly in a magnetic field of strength $4 \times {10^{ - 5}}\,Wb/{m^2},$ it is rotated through ${90^o}$ in 0.1 sec. The average e.m.f. induced in the coil is

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• In an induction coil with resistance, the induced emf will be maximum when

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• A coil of area 80 square cm and 50 turns is rotating with 2000 revolutions per minute about an axis perpendicular to a magnetic field of 0.05 Tesla. The maximum value of the e.m.f. developed in it is

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• A cylindrical bar magnet is kept along the axis of a circular coil. If the magnet is rotated about its axis, then

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• The mutual inductance between a primary and secondary circuits is 0.5 H. The resistances of the primary and the secondary circuits are 20 ohms and 5 ohms respectively. To generate a current of 0.4 A in the secondary, current in the primary must be changed at the rate of

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