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 `12.5 Omega`. Determine the resistance of X. Why are the connections between resistors in a Wheatstone or meter bridge made of thick copper strips?

Explanation

To solve the problem step by step, we will first determine the resistance of resistor X using the balance point of the metre bridge. Then, we will discuss why thick copper strips are used for connections in a Wheatstone or metre bridge.

### Step 1: Understand the Balance Condition of the Meter Bridge
The balance condition of a metre bridge is given by the formula:

\[ \frac{X}{Y} = \frac{100 - L_1}{L_1} \]
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