Practice Assignment 4 (Ch19, 20) Begin Date: 7/2/2017 : 8/8/2017 11:59:00 PM End

Question

Practice Assignment 4 (Ch19, 20) Begin Date: 7/2/2017 : 8/8/2017 11:59:00 PM End Date: 8/9 2017 1:00:00 AM (11% ) Problem 7: A coil of area A = 0.65 m2 is rotating with angular speed sso rad's with the axis of rotation perpendicular to a B 0.55 T magnetic field. The coil has N = 450 turns. ment Status k here for ailed view Otheexpertta.com em Status 50% Part (a) Express the maximum emf induced in the loop, ro-in terms of A,a, B. and N. to-I Potential 100% Atmempts remaining: 10 _ per attempt) 12 3 Hint

Explanation / Answer

A.

emf is given by:

emf = -N*d(phi)/dt

phi = B.A = B*A*cos wt

d(phi)/dt = A*B*w*sin wt

emf = -N*A*B*w*sin wt

max emf will be when sin wt = 1

emf)max = N*A*B*w

2.

emf)max = 450*0.65*0.55*580 = 93307.5 V

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