The value of R in the above circuit to make the - 752 - JAMB Physics 2024 Question

Here's how to solve this problem:

1. Understand the Circuit: The circuit appears to be a Wheatstone bridge configuration. The galvanometer is in the middle branch.

2. Wheatstone Bridge Balance Condition: For the galvanometer to measure 2A, there must be a current flowing through the galvanometer, which implies that the bridge is not balanced.

3. Analyze the Circuit: The problem states that the galvanometer measures 2A. Since the galvanometer isn't measuring zero current, the Wheatstone bridge is not balanced. We would need more information to determine the exact value of R based only on the information that the galvanometer measures 2A. However, since the question asks for a value, let us assume an ideal case.

4. Solve for R: If