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Two unknown resistances X and Y are plac...

Two unknown resistances `X` and `Y` are placed on the left and right gaps of a meter bridge. The null point in the galvanometer is obtained at a distance of `80 cm` from left. A resistance of `100 Omega` is now connected in parallel across `X`. The null point is then found by shifting the sliding contact toward left by `20 cm`. Calculate `X` and `Y`.

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