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Related Questions

• The current through choke coil increases form zero to 6A in 0.3 seconds and an induced e.m.f. of 30 V is produced. The inductance of the coil of choke is

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• A coil has 2000 turns and area of $70c{m^2}$. The magnetic field perpendicular to the plane of the coil is $0.3Wb/{m^2}$and takes $0.1 sec$ to rotate through ${180^o}$. The value of the induced e.m.f. will be

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• Lenz’s law is expressed by the following formula (here e = induced e.m.f., $\varphi$ = magnetic flux in one turn and N = number of turns)

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• A square coil ${10^{ - 2}}{m^2}$ area is placed perpendicular to a uniform magnetic field of intensity ${10^3}Wb/{m^2}$. The magnetic flux through the coil is

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• A magnet is dropped down an infinitely long vertical copper tube

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