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Two resistors, R1 and R2, are connected in the left gap and the right gap of a metre bridge, and the balancing length is obtained at 20 cm from the left. On inter-changing the resistors in the two gaps, the balancing length shifts by

(A) 20 cm

(B) 40 cm 

(C) 60 cm 

(D) 80 cm.

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by (33.7k points)

Correct option is (C) 60 cm

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