This lab involves an animation of an RC circuit. By clicking on the connect batt

Question

This lab involves an animation of an RC circuit. By clicking on the connect battery link below the animation, you close switch 1 and open switch 2 connecting a 40V battery to the resistor and capacitor in series. By clicking on the disconnect battery link, you close switch 2 and open switch 1 eliminating the battery from the circuit and connecting the resistor and capacitor in series. On the right hand side a graph of the current vs. time through the resistor is shown.

9. Immediately after the battery is disconnected, what is the voltage across the capacitor?

a. 0 V

b. 10 V

c. 20 V

d. 30 V

e. 40 V

Explanation / Answer

Before the battery is disconnected the capacitor is fully charged hence its voltage will be V= 40 V after you reopen the switch 1 and close switch 2. Thus battery charges the capacitor with V= 40 V

Thus V= 40 V

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