At t =0s, the current in the circuit in the figure is i0. at what time is the current 12i0?

When the current is time-dependent, the circuit has a capacitor. A capacitor could be used to store energy. As you use it up, the energy depletes. This is why it is time-dependent. The answer is 12 seconds. I hope I answered your question. Have a good day and thanks.

as technology advances, new experiments often expose problems in accepted theories. c

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-lavira: )