What is the potential difference between points a and b?
A)6.0 V
B)8.0 V
C)12 V
D)24 V

Question

What is the potential difference between points a and b? 
A)6.0 V 
B)8.0 V 
C)12 V 
D)24 V

Quizplus · Accepted Answer

The potential difference between two points is equal to the work required to move a unit of charge from one point to another. In this case, the path from point A to B has two parts: one through the 12 V battery, and the other through the 6 V battery. So, the total potential difference is the sum of the potential differences of the two batteries, which is 12 V + 6V = 18 V. However, we need to remember that the current flows from higher potential to lower potential, so the potential difference between point A and B is in the opposite direction, which is 18 V - 6 V = 12 V. Therefore, the correct answer is C.

What Is the Potential Difference Between Points a and B