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Related Questions

• In a region of uniform magnetic induction $B = {10^{ - 2}}\,tesla$, a circular coil of radius 30 cm and resistance $\pi ^2 ohm$ is rotated about an axis which is perpendicular to the direction of B and which forms a diameter of the coil. If the coil rotates at 200 rpm the amplitude of the alternating current induced in the coil is

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• Dynamo core is laminated because

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• A coil of $N$ turns and mean cross-sectional area $A$ is rotating with uniform angular velocity $\omega$ about an axis at right angle to uniform magnetic field $B$. The induced e.m.f. $E$ in the coil will be

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• A transformer has turn ratio 100/1. If secondary coil has 4 amp current then current in primary coil is

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• The coefficient of mutual inductance of two coils is 6 mH. If the current flowing in one is 2 ampere, then the induced e.m.f. in the second coil will be

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