7. [8 points] In the circuit shown, switch S has been open for a long time and the capacitors are 2R uncharged. Then switch S is closed. $12 S WWW R C 3C (a) What is the current /3 just after switch S is closed? Outer Loop : E - I, ( 2R) = O because no P/C Q= O 2R I2 = 0 because voltage across C is zero 65 C (b) Switch S has remained closed for a long time. Then it is opened. What is the current /3 just after switch S is opened? O no P/C both are charged to the same voltage E => no voltage drop across R