[填空题]
(a) What is the potential difference b- u:xax1 hm,po4vvqb5etween points a and d in (Fig. g j6pih (a1vg:b ,t)ksBelow a) (same circuit)tk(: 1apj g, bvighs6 as Fig. Below b, ), $V_{ad}$ V
(b) what is the terminal voltage of each battery?
80V battery V
45V battery V
a
b