The flexible loop in the figure below has a radius of 15 cm and is in a magnetic field of strength 0.12 T. The loop is grasped atpoints A and B and stretched until its area is nearly zero. If it takes 0.23 s to close the loop, what is the magnitude of the averageinduced emf (in mV) in it during this time?xAx**B|E|mVSubmit Answer

Magnitude of the induced emf is 37mV.Explanation:

Answered: The flexible loop in the figure below…

Physics for Scientists and Engineers: Foundations and Connections

1st Edition

ISBN:9781133939146

Author:Katz, Debora M.

Publisher:Katz, Debora M.

Chapter32: Faraday’s Law Of Induction

Section: Chapter Questions

Problem 62PQ

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Consider the system pictured in Figure P28.26. A 15.0-cm horizontal wire of mass 15.0 g is placed between two thin, vertical conductors, and a uniform magnetic field acts perpendicular to the page. The wire is free to move vertically without friction on the two vertical conductors. When a 5.00-A current is directed as shown in the figure, the horizontal wire moves upward at constant velocity in the presence of gravity. (a) What forces act on the horizontal wire, and (b) under what condition is the wire able to move upward at constant velocity? (c) Find the magnitude and direction of the minimum magnetic Field required to move the wire at constant speed. (d) What happens if the magnetic field exceeds this minimum value? Figure P28.26
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