Question

A fixed 12.1-cm-diameter wire coil is perpendicular to a magnetic field 0.55 T pointing up. In 0.26 s, the field is changed to 0.20 T pointing down. Part A What is the average induced emf in the coil? Express your answer to two significant figures and include the appropriate units. НА ? E = Value Units Submit Request Answer

Answer 1

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Induced emfis ginen by .12.1cm eina .do at leinl= do dt where by magnetic flux dt → change in time. do = 92-Q, ♡ - Brt dp = Bg A - BIA A (Bg-B,) - A = ad² 1 ( 12.1.x10-2) ? 114.99 X10-4 4 4. 1:1499 x 10 -4m? A Bas 0.20 T, B,= 0.55 T. do = A (Bg - Bi) (1.1499x104) (0-20-0.55) dt - 0.268 o lin= (1.1499x104) x(0.35) -4 = 1.54 6 X10 V (0.268) dt

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