A potentiometer , with a wire of length 10 m, is connected to an accululator of steady voltage. A lenchlanche cell gives a null point at 7.5 m If the length of the potentiometer wire is increaseed by 1 m, find the new posistion of the balance point.

Explanation

To solve the problem step by step, we will use the principles of a potentiometer and the relationship between the lengths of the wire and the potential difference across it.

### Step-by-Step Solution:

1. **Understand the Initial Conditions**:
- The length of the potentiometer wire, \( L = 10 \, \text{m} \).
- The null point (balance point) with the Leclanché cell is at \( I_2 = 7.5 \, \text{m} \).

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