When switching between the charging and discharging phases in a series RC circui

Question

When switching between the charging and discharging phases in a series RC circuit. A) the current reverses its direction, the voltage across the resistor reverses its polarity, and the voltage across the capacitor reverses its polarity. B) the current reverses its direction, the voltage across the resistor reverses its polarity, and the voltage across the capacitor maintains its polarity. C) the current reverses its direction, the voltage across the resistor maintains its polarity, and the voltage across the capacitor maintains its polarity. D) the current maintains its direction, the voltage across the resistor maintains its polarity, and the voltage across the capacitor reverses its direction. E) none of the above 10 C of positive charge starts from the negative end of an Emf, flows through the Emf to the positive end, then flows through a wire to a resistor, then flows through the resistor, and finally flows back through a wire back to its original starting location. During this process, the 10 C of positive charge: A. supplies Electric Potential Energy to the Emf B. receives Electric Potential Energy from the resistor C. has a net loss of Electrostatic Potential energy D. has a net gain of Electric Potential Energy E. has no net change in Electric Potential Energy

Explanation / Answer

17) B

18) E

because initial and final potentials are same.

so, there is no change in potential energy.

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