In the experimental set up of Meter Bridge shown in the figure, the null point is obtained at a distance of 40 cm from A. If a 10 Ω resistor is connected in series with R1, the null point shifts by 10 cm. The resistance that should be connected in parallel with (R1 + 10) Ω such that the null point shifts back to its initial position is

In the experimental set up of Meter Bridge shown in the figure, the nu

1.	In the experimental set up of Meter Bridge shown in the figure, the null point is obtained at a distance of 40 cm from A. If a 10 Ω resistor is connected in series with R1, the null point shifts by 10 cm. The resistance that should be connected in parallel with (R1 + 10) Ω such that the null point shifts back to its initial position is
A.	60 Ω
B.	20 Ω
C.	30 Ω
D.	40 Ω
Answer» B. 20 Ω

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