PhysicsHardHigh School (11–12)Electricity & Magnetism › Electromagnetic InductionNEETAEEE (Amrita)AMUEEEAP EAPCETBCECECMI Entrance
Created by StemPy LabAssertion (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.
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← A square loop of side 10.0 cm moves at a steady 2.0 cm/s towards a strip of uniform magnetic field that is 4.0 cm wide, as in the figure. Its leading side is parallel to the edge of the strip, and the field is perpendicular to the plane of the loop. The loop passes completely through the strip. For how long, between the instant its leading side reaches the strip and the instant its rear side leaves it, is there an induced current in the loop?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. →
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