[填空题]
(a) What is the potential difference between points a and dfeal18*+fl2 b- 3 qgr f*ohewa in (Fig.dazah5q7;6*em 8hf(wes*gs r Below a) (same cia me*875*rqwhazs 6 dg;(ehf srcuit as Fig. Below b, ), $V_{ad}$ V
(b) what is the terminal voltage of each battery?
80V battery V
45V battery V
a
b