Answered: Figure P20.10

Physics for Scientists and Engineers: Foundations and Connections

1st Edition

ISBN:9781133939146

Author:Katz, Debora M.

Publisher:Katz, Debora M.

Chapter9: Energy In Nonisolated Systems

Section: Chapter Questions

Problem 13PQ

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Question

An N - turn circular wire coil of radius r lies in the
xy - plane (the plane of the page), as in Figure P20.10. A uniform
magnetic field is turned on, increasing steadily from 0
to B₀ in the positive z - direction in t seconds. (a) Find a symbolic
expression for the emf, ε, induced in the coil in terms
of the variables given. (b) Looking down on at the xy -plane
from the positive z - axis, is the direction of the induced current
clockwise or counterclockwise? (c) If each loop has
resistance R, find an expression for the magnitude of the
induced current, I.

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