EXAMIANS
The law that the induced e.m.f. and current always oppose the cause producing them is due to
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Which circuit element(s) will oppose the change in circuit current?
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A laminated iron core has reduced eddy-current losses because
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A moving magnetic field will produce the same effect as a conductor that is moving.
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Air-core coils are practically free from
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Which of the following is unit of inductance?
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The property of coil by which a counter e.m.f. is induced in it when the current through the coil changes is known as
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An average voltage of 10 V is induced in a 250 turns solenoid as a result of a change in flux which occurs in 0.5 second. The total flux change is
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An open coil has
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The core of a coil has a length of 200 mm. The inductance of coil is 6 mH. If the core length is doubled, all other quantities, remaining the same, the inductance will
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