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Q.

In an experiment to determine the internal resistance of a cell with potentiometer, the balancing length is 165cm. When a reistance of 5 ohm is joined in parallel with the cell the balancing length is 150cm. The internal resistance of cell is

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a

2.2Ω

b

1.1Ω

c

3.3Ω

d

0.5Ω

answer is D.

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