Magnetic Flux and Induced EMF in a Coil 90120 Previous Answer Correct A coil has

Question

Magnetic Flux and Induced EMF in a Coil 90120 Previous Answer Correct A coil has 170 turns enclosing an area of 11.8 cm In a physics laboratory experiment, the coil is rotated during the time interval 4.10x10-2 s from a position in which the plane of each turn is perpendicular to Earth's magnetic field to one in which the plane of each turn is parallel to the field The magnitude of Earth's magnetic field at the lab location is 5.20x10-5 T Part C What is the magnitude of the average emf induced in the entire coil? If a symbolic answer is required, your expression must include B, A, and any other variables View Available Hint(s) average induced emf-15-10 Submit Previous Answers Incorrect; Try Again Provide Feedback Next >

Explanation / Answer

magneitc flux = N*B*A*costheta

when the plane perpendicular to field

theta = 0

magnetic flux phi1 = N*B*A

when the plane parallel to field

theta = 90

magnetic flux phi 2 = 0

induced emf = -rate of change in flux

emf e = -(phi2 - phi1)/t

e = NBA/t = 170*5.2*10^-5*11.8*10^-4/(4.1*10^-2) = 2.54*10^-4 V

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