The network in Fig. 1 employs a DMM with an internal resistance of 10 MΩ in the voltmeter...

The network in Fig. 1 employs a DMM with an internal resistance of 10 MΩ in the voltmeter mode. The switch is closed at t = 0 s.

a. Find the voltage across the coil the instant after the switch is closed.

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b. What is the final value of the current iL?

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c. How much time must pass before iL reaches 10 μA?

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d. What is the voltmeter reading at t = 12 μs?

FIG. 1