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The current flows in a circuit as shown below. If a second circuit is brought near the first circuit then the current in the second circuit will be:-
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Important Questions on Electromagnetic Induction
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A coil of resistance and turns have the magnetic flux line of . If the magnetic flux changed to in , then the induced charge in coil is:
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A coil of resistance is connected to a galvanometer of resistance. The coil has radius and turns. This coil is placed between the poles of a magnet such that magnetic field is perpendicular to the coil. If the coil is dragged out, then the charge through the galvanometer is . The magnetic field is
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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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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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An emf induced in a coil, the linking magnetic flux
