Find the resistance of the given wire by metre bridge?

Question: Find the resistance of the given wire by metre bridge?

Then point B and point D are at the same potential. In this case X/R = resistance of the meter bridge between A and D/ Resistance of the meter bridge wire between D and C, X/R = lx/(100 – l)x, x/R = l/ (100 – l), x = R l/(100 – l) So we can find the unknown resistance in this way.

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