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In a circuit a coil of resistance then magnetic flux changes from to in 0.2 sec. The charge flow in the coil during this time is :-
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Important Questions on Electromagnetic Induction
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A circular loop of radius 2cm, is placed in a time varing magnetic field with rate of 2T/sec. Then induced electric field in this loop will be :-
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The value of self inductance of a coil is . The value of current changes from , then value of induced emf in it is,
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A coil of self inductance carries a current. If direction of current is reversed in , then induced emf in it is,
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For a coil having , current flow through it is, . Then, the time at which emf becomes zero is,
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Current through a coil varies according to graph. Then, induced emf v/s time graph is,
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A solenoid has a self inductance of . If the length of the solenoid is doubled having turn density and area constant, then new self inductance is,
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A solenoid is wound over a rectangular frame. If all the linear dimensions of the frame are increased by a factor and the number of turns per unit length remains the same, the self inductance increased by a factor of,
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A coil has inductance of has a current of . The flux, in weber, through the coil is,
