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18. At t 0, a rectangular loop of wire with resistance R = 2.0 0 and dimensions W 3.0 cm and L 8.0 cm enters a region of cons

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Answer 1

Answer #1

a] emf induced = BWv = 1.6*0.03*5e-2 = 0.0024 V

b] Force required= magnetic force = iWB = (emf)/R *WB = [0.0024/2]*0.03*1.6 = 0.0000576 N

c] It will no longer require the force when it will come completely in the field, because net magnetic force will be zero

t = L/v = 0.08m/(0.05cm/s) = 1.6 sec answer

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Answer 2

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