A solenoid of radius 1.5 cm has 480 turns and a length of 15 cm. (a) Find its inductance. mH (b) Find the rate at which current must change through…

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A solenoid of radius 1.5 cm has 480 turns and a length of 15 cm. (a) Find its inductance. mH (b) Find the rate at which current must change through it to produce an emf of 50 mV. (Enter the magnitude.)