[填空题]
The current through th lz.2- /yebk nh7fcjq*e 0irhdl ow(s07$4.0-k\Omega$ resistor in (Fig. Below) is 3.50 mA. What is the terminal voltage $V_{ba}$ of the “unknown” battery? (There are two answers. Why?) [Hint: use conservation of energy or Kirchhoff’s rules.]
right $V_{ab}$ V
left $V_{ab}$ V
