A constant magnetic field passes through a single rectangular loop whose dimensions are 0.348 m x 0.593 m. The magnetic field has a magnitude of 2.26 T and is inclined at an angle of 66.0° with respect to the normal to the plane of the loop. (a) If the magnetic field decreases to zero in a time of 0.475 s, what is the magnitude of the average emf induced in the loop?(adsbygoogle = window.adsbygoogle || []).push({});

(b) If the magnetic field remains constant at its initial value of 2.26 T, what is the magnitude of the rate at which the area should change so that the average emf has the same magnitude?

I know how to figure out part a, its part b that confused me.

a) E=NAcos(theta)((B1-B2)/(t1-t2))

=3.99*10^-1 V

b) E=N(change in flux/change in time) and (change in flux)=BAcos(theta)

E=N(BAcos(theta)/(change in time))

E=NA(cos(theta))(change in B/change in time)

I think I may be going about an equation wrong, and I cant distinguish when to focus on a change in B and change in area. because I worked with B in the previous question. I dunno, I'm just confused.

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# Homework Help: Faraday's Law of Electromagnetic Induction

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