# A 30 resistance is connected in series with the smaller of the the resistance, the null point shifts by 20 cm to the right end. The value of smaller resistance in  is 48 12 36 24

Let the two resistors have resistances x  and y

Solving above equations we get x = 24 and y = 36

The value of smaller resistance in  is 24.

Option 4 is correct

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