An unknown resistance R1 is connected in series with a resistance of 1 – McqOptions

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1.	An unknown resistance R1 is connected in series with a resistance of 10 W. This combinations is connected to one gap of a metre bridge while a resistance R2 is connected in the other gap. The balance point is at 50 cm. Now, when the 10 W resistance is removed the balance point shifts to 40 cm. The value of R1 is (in ohm) [KCET 2004]
A.	60
B.	40
C.	20
D.	10
Answer» D. 10

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