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Related Questions

• A loss free transformer has 500 turns on its primary winding and 2500 in secondary. The meters of the secondary indicate 200 volts at 8 amperes under these conditions. The voltage and current in the primary is

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• Magnetic flux $\varphi$ (in weber) linked with a closed circuit of resistance 10 ohm varies with time t (in seconds) as $\varphi = 5{t^2} - 4t + 1$. The induced electromotive force in the circuit at t = 0.2 sec. is

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• The north pole of a magnet is brought near a metallic ring. The direction of the induced current in the ring will be

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• A coil of area $100c{m^2}$ has 500 turns. Magnetic field of $0.1\;weber/metr{e^2}$ is perpendicular to the coil. The field is reduced to zero in 0.1 second. The induced e.m.f. in the coil is

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• In the diagram shown if a bar magnet is moved along the common axis of two single turn coils A and B in the direction of arrow

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