The potential across a capacitor in an RC circuit is expressed as:
, where V is the voltage at a time t, V0 is the initial voltage, t is the time taken for the voltage to reduce from V0 to V, Req is the equivalent resistance, and Ceq is the equivalent capacitance.
Equivalent resistance for resistors in series:
For capacitors in parallel, the equivalent capacitance is:
In the circuit shown in the figure (Figure 1), both capacitors are initially charged to 50.0 V.
Part A) How long after closing the switch S will the potential across each capacitor be reduced to 10.0 V?
Part B) What will be the current at that time?
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