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After being closed for a long time, the switch S in the circuit shown in the figure below is thrown open at t = 0. In the circuit, E = 24.0 V, R = 4.50 kO,
Rg = 6.80 k2, and L = 570 mH.
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(a) What is the emf across the inductor immediately after the switch is opened?
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(b) When does the current in the resistor Rg have a magnitude of 1.00 mA?
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