An inductor and a resistor are connected with a double pole switchto a battery a

Question

An inductor and a resistor are connected with a double pole switchto a battery as shown in the figure. The switch has been inposition b for a long period of time.If the switch is thrown fromposition b to position a (connecting the battery), how much timeelapses before the current reaches 139 mA? Answer in units ofms. What is the maximum current in the inductor a long time after theswitch is in position a? Answer in units of A. The switch has brushes within it so that the switch can be thrownfrom a to b without internal sparking. Now the switch is smoothlythrown from a to b, shorting the inductor and resistor. How muchtime elapses before the current falls to 117 mA? Answer in units ofms.

Explanation / Answer

A

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