Chapter 26

Question 1

Current directions when charging versus discharging

Answer 1

When we close the switch and the charges across capacitor recombine, then the current will change direction

Question 2

Charging : i, q, v

Answer 2

i: i(t) = Io e^-t/RC
q: CEmf (1 - e^-t/RC)
v: Vo (1 - e^-t/RC)

Question 3

Discharging : i, q, v

Answer 3

i: i(t) = -Qo/RC (e^-t/RC) (Note “-“!!!! changes direction!)
q(t): Qo (e^-t/RC)
v: Vo (e^-t/RC)