In a metre bridge, the balance point is found to be at` 39.5 cm` from the end A, when the resistor Y is of `12.5Ω`.(value of `X=19.14`Ω) Determine the balance point of the above bridge if X and Y are interchanged.

Explanation

To solve the problem, we will use the principle of a meter bridge, which is based on the Wheatstone bridge concept. The balance point in a meter bridge is determined by the ratio of the resistances on either side of the bridge.

### Step-by-Step Solution:

1. **Identify the Given Values:**
- Balance point when Y = 12.5Ω is at L1 = 39.5 cm from end A.
- Resistance X = 19.14Ω.

...