Figure 3-14B.Virtual ground circuits.
Figure 3-14C.Virtual ground circuits.
In view (A), V1 (the left-hand battery) supplies +10 volts to the circuit while V2 (the right-hand
battery) supplies -10 volts to the circuit. The total difference in potential in the circuit is 20 volts.
The total resistance of the circuit can be calculated:
Now that the total resistance is known, the circuit current can be calculated: