Suppose that at t = 0, we connect an uncharged 10-μF capacitor to a charging circuit consisting of a 2300-V voltage source in series with a 2-MΩ resistance. At t = 40 s, the capacitor is disconnected from the charging circuit and connected in parallel with a 5-MΩ resistor.
Part A
Determine the voltage across the capacitor at t = 40 s.
Express your answer to three significant figures and include the appropriate units.
v_C(40) =
Part B
Determine the voltage across the capacitor at t = 100 s. (Hint: You may find it convenient to redefine the time variable to be t' = t - 40 for the discharge interval so that the discharge starts at t' = 0.)
Express your answer to three significant figures and include the appropriate units.
v_C(100) =