Question

The current through the $8\Omega$ resistor is

• A. 4 A
• B. 2 A
• C. zero
• D. 2.5 A

Answer 1

The correct option is C zero

Since the 12V batteries are oppositely oriented in series, the net potential difference across the combination is zero.
Similarly the 6V batteries are oppositely oriented in series, the net potential difference across the combination is zero.
Thus it is similar to the case where there is no external potential difference applied to the circuit. Thus there is no current in the circuit.