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Re: [Phys-l] Question about Electromagnetic Induction



The flux and therefore the change in flux will be fixed by the inner loop--but the resistance is a function of the size of the outer loop, so the current induced will depend on it as well. So the current should be inversely proportional to 'a'. Now if loop 'a' is super-conducting......

Rick

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Richard W. Tarara
Professor of Physics
Saint Mary's College
Notre Dame, IN
rtarara@saintmarys.edu
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----- Original Message ----- From: "Fakhruddin, Hasan" <hfakhrud@bsu.edu>
To: "'Forum for Physics Educators'" <phys-l@carnot.physics.buffalo.edu>
Sent: Monday, April 06, 2009 1:44 PM
Subject: [Phys-l] Question about Electromagnetic Induction


Greetings folks!

Consider a circular conducting loop of radius 'a'. Concentric and coplanar to it is a circle of radius 'b' (b<a) within which there is uniform magnetic field perpendicular to the plane of the conducting loop. The magnetic field is varying at a rate dB/dt.

QUESTION: Does the induced emf in the loop depend on the radius 'a'? If not, then can the radius 'a' take larger values without limit?

~Hasan Fakhruddin
Instructor of Physics
The Indiana Academy for Science, Mathematics, and Humanities
Ball State University
Muncie, IN 47306
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