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Two resistances are connected in the two...

Two resistances are connected in the two gaps of a meter bridge. The balance point is `20 cm` from the zero end. When a resistance `15 Omega` is connected in series with the smaller of two resistance, the null point+ shifts to `40 cm`. The smaller of the two resistance has the value.

A

3

B

6

C

9

D

12

Text Solution

Verified by Experts

The correct Answer is:
C
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ERRORLESS -CURRENT ELECTRICITY-Self Evaluation Test -19
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