[填空题]
Two resistors and two uncharged capacitors are arranged as sh7- )c+h0z) tdade l-o ; tdlr+iskjdq3own in (Fig. Belo.me ph 1v3ypdsc3)xs g-s1-; p0ggmy cw). Then a potential diffem.epxms1p sy0p 3hvcg g;- scd-y3g1)rence of 24 V is applied across the combination as shown.
(a) What is the potential at point a with switch S open? (Let $V=0$ at the negative terminal of the source.) V
(b) What is the potential at point b with the switch open? V
(c) When the switch is closed, what is the final potential of point b? V
(d) How much charge flows through the switch S after it is closed? $\mu F$
