PhysicsAdvancedHigh School (11–12)Electricity & Magnetism › Electromagnetic InductionNEETAEEE (Amrita)AMUEEEAP EAPCETBCECECMI Entrance
Created by StemPy LabA square loop of side and resistance is pulled at constant speed out of a uniform field perpendicular to its plane. Two statements are given below. Statement I: The force needed does not depend on , because the induced emf does not. Statement II: Doubling doubles the power supplied by the puller.
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← Assertion (A): A straight metal rod moves at constant velocity at right angles to its length and to a uniform magnetic field. A potential difference appears between its ends, even though the rod is not joined to anything else and no current flows in it.
Reason (R): The magnetic force on the free electrons in the rod moves them towards one end, until the electric field of the separated charges balances the magnetic force on each electron.A uniform field B 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 l turning at ω 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 N turns, area A, turning at ω List-II (Emf) I. 0 II. N B A ω III. 1/2 B ω l² IV. 1/8 B ω l² →
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