Question

3. 15 points KatzPSE1 29.P.060 My Notes Ask Your Teacher The figure below shows a simple RC circuit with a 1.50-uF capacitor, a 3.20-ΜΩ resistor, a 9.00-V em, and a switch. What are the following exactly 6.50 s after the switch is closed? (a) the charge on the capacitor (b) the current in the resistor HA (c) the rate at which the capacitor is storing energy Hw (d) the rate at which the battery is delivering energy HW Submit Answer Save Progress Practice Another Version

Answer 1

A)

Charge, Q = Qo (1 - e^-t/RC)

Q = 1.5 x 9 (1 - e^-(6.5/(3.2 x 1.5)) = 10.01 uC

B)

Current, I = (V/R) e^-t/RC

I = (9/3.2 x 10^6) e^-(6.5/3.2 x 1.5) = 0.73 uA

C)

dE/dt = Q/C x I = (10.01/1.5) x 0.73 = 4.87 uW

D)

Power, P = VI = 9 x 0.73 = 6.57 uW

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