A flexible, circular conducting loop of radius R = 0.15 m lies in a uniform magnetic field B = 0.25 T. The loop is pulled on opposite sides by equal forces and stretched until its enclosed area A is essentially zero m², as suggested in the drawings. It takes At = 0.30 s to close the loop. X X X X X X X X X X X X X X X initial situation X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X final situation 13. Determine the magnitude of the EMF induced in the loop. A) 1.2 x 10-1 V B) 1.8 x 10-2² V C) 1.8 x 102 V D) 5.9 x 10-² V E) 5.9 × 102 V X X X

A flexible, circular conducting loop of radius R = 0.15 m lies in a uniform magnetic field B = 0.25 T. The loop is pulled on opposite sides by equal forces and stretched until its enclosed area A is essentially zero m², as suggested in the drawings. It takes At = 0.30 s to close the loop. X X X X X X X X X X X X X X X initial situation X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X final situation 13. Determine the magnitude of the EMF induced in the loop. A) 1.2 x 10-1 V B) 1.8 x 10-2² V C) 1.8 x 102 V D) 5.9 x 10-² V E) 5.9 × 102 V X X X

Physics for Scientists and Engineers with Modern Physics

10th Edition

ISBN:9781337553292

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter30: Faraday's Law

Section: Chapter Questions

Problem 21P: Within the green dashed circle show in Figure P30.21, the magnetic field changes with time according...

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Within the green dashed circle show in Figure P30.21, the magnetic field changes with time according to the expression B = 2.00t3 4.00t2 + 0.800, where B is in teslas, t is in seconds, and R = 2.50 cm. When t = 2.00 s, calculate (a) the magnitude and (b) the direction of the force exerted on an electron located at point P, which is at a distance r = 5.00 cm from the center of the circular field region. (c) At what instant is this force equal to zero? Figure P30.21
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