Homework Answers
a] induced emf = rate of change of flux = B*L*v = 0.57*0.16*0.79 = 0.072 V
b] current i = induced emf/R = 0.072/32 = 0.00225 A
c] direction of current I = from b to a, by Lenz law. Since area of loop is increasing, by Lenz law, field into the page should decrease, so current has to be counterclockwise.
d] magnitude of force = iLB = 0.00225*0.16*0.57 = 0.0002052 N
direction = iL x B = j^ x -k^ = -i^ , so direction is leftward
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