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In the circuit shown in fig switch S is...

In the circuit shown in fig switch S is closed at time t =0.

a. What is the current `I_(0)` leacing the battery at t=0, immediately after the switch is closed?
b. What is the current I "long time" later?
c. What charge has accmulated on the capacitor after this long time?
d. If, finally, swtich S is opened again, how long will it take after the switch is opened for the capactior to lose 80% of its charge?

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