- Homework Statement
- The answers of this question is mentioned to be A & C. My question is why isn't B true?
Please be kind to help
- Relevant Equations
My reasoning is that the wire has a resistance/unit length. The resistance of AD must equal that of AB for D to be called a null point. If we move jockey to the left, the resistance of AD decreases, thereby decreasing the potential drop across it. This means that the V of D is more than that of B causing a current to flow from D to B. So according to me B should be an answer, while the textbook says.