PhysicsHardHigh School (11–12)Electricity & Magnetism › Electromagnetic InductionNEETAEEE (Amrita)AMUEEEAP EAPCETBCECECMI Entrance
Created by StemPy LabA uniform field is perpendicular to the plane in which each rod turns and to the axis of the coil. Match each situation with its emf. List-I (Situation) A. Ends of a rod of length turning at about one end B. Ends of the same rod turning about its middle C. Middle and one end of that rod turning about its middle D. Peak emf of a coil of turns, area , turning at List-II (Emf) I. II. III. IV.
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← A square loop of side a and resistance R is pulled at constant speed v out of a uniform field B perpendicular to its plane. Two statements are given below. Statement I: The force needed does not depend on R, because the induced emf does not. Statement II: Doubling v doubles the power supplied by the puller.Six statements about electromagnetic induction are given. (i) A loop moving at constant velocity, wholly inside a uniform field, has no induced current. (ii) The induced emf in a loop depends on its resistance. (iii) The charge flowing round a loop is ΔΦ/R, whatever the time the flux takes to change. (iv) Eddy currents form only in wire loops, never in solid blocks. (v) Laminating a transformer core reduces eddy currents. (vi) Lenz's law follows from conservation of charge. How many of the statements above are correct? →
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