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Related Questions

• The back e.m.f. induced in a coil, when current changes from $1 ampere$ to zero in one milli second, is 4 volts, the self inductance of the coil is

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• In a coil of area $10\;c{m^2}$ and 10 turns with a magnetic field directed perpendicular to the plane and is changing at the rate of ${10^8}$gauss/second. The resistance of the coil is 20 ohm. The current in the coil will be

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• 5 cm long solenoid having 10 ohm resistance and 5 mH inductance is joined to a 10 volt battery. At steady state the current through the solenoid in ampere will be

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• An inductor, L a resistance R and two identical bulbs, ${B_1}$ and ${B_2}$ are connected to a battery through a switch S as shown in the figure. The resistance R is the same as that of the coil that makes L. Which of the following statements gives the correct description of the happenings when the switch S is closed

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• A rectangular coil of 300 turns has an average area of average area of $25\;cm \times 10\;cm.$ The coil rotates with a speed of 50 cps in a uniform magnetic field of strength $4 \times {10^{ - 2}}T$ about an axis perpendicular of the field. The peak value of the induced e.m.f. is (in volt)

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