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A short bar magnet passes at a steady speed right through a long solenoid. A galvanometer is connected across the solenoid. Which graph best represents the variation of the galvanometer deflection with time:-
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Important Questions on Electromagnetic Induction
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A square loop of side is changed to a circle in time . The magnetic field present is . The emf induced is:
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The magnetic flux in a coil of 100 turns increases by 12 × 103 Maxwell in 0.2 s due to the motion of a magnet. The emf induced in the coil will be :
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A closed coil consists of 500 turns on a rectangular frame of area 4.0 cm2 and has a resistance of 50 ohms. The coil is kept with its plane perpendicular to a uniform magnetic field of 0.2 wb/m2, the amount of charge flowing through the coil if it is turned over (rotated through 180º) :
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A coil of mean area and having turns is held perpendicular to a uniform field of gauss. The coil is turned through in second. The average induced is
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Consider a metal ring kept on a horizontal plane. A bar magnet is held above the ring with its length along the axis of the ring. If the magnet is dropped freely the acceleration of the falling magnet is (g is acceleration due to gravity) :
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An electron beam is moving near to a conducting loop then the induced current in the loop :-
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The current flows from A to B as shown in the figure. The direction of the induced current in the loop is :-
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Faraday law represents :-
