Question

In the circuit shown above, the current in each battery is 0.04 ampere. What is the potential difference between the points x and y?

(A) 8 V 

(B) 2 V 

(C) 6 V 

(D) 0 V 

(E) 4 V

Answer 1

The correct option is: (D) 0 V 

Explanation:

Utilizing Kirchhoff’s loop rile with any loop including the lower branch gives 0 V since the resistance next to each battery drops the 2 V of each battery leaving the lower branch with no current. You can also think of the junction rule where there is 0.04 A going into each junction and 0.04 A leaving to the other battery, with no current for the lower branch.