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An induced is produced when a magnet is plunged into a coil. The strength of the induced is independent of,
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Important Questions on Electromagnetic Induction
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A cylindrical bar magnet is kept along the axis of a circular coil. If the magnet is rotated about its axis, then
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Two different wire loops are concentric and lie in the same plane. The current in the outer loop (I) is clockwise and increases with time. The induced current in the inner loop
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A square loop of side is converted into circular loop in . A uniform magnetic field of directed normal to the loop, then the induced in the loop is,
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A coil is wound on a frame of rectangular cross-section. If the linear dimensions of the frame are doubled and the number of turns per unit length of the coil remains the same, then the self inductance increases by a factor of
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When the current changes from to in , an emf of is induced in the coil. The coefficient of self induction of the coil is
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The coefficients of self induction of two coils are and . To induce an of in the coil, a change of current of has to be produced in and , respectively. The ratio of their self inductances will be,
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When the number of turns in a coil is doubled without any change in the length of the coil, its self inductance
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The number of turns in a coil of wire of fixed radius is and its self inductance is . The self inductance of a coil of turns will be,
