Two resistances are connected in the two gaps of a meter bridge. The balance point is `20 cm` from the zero end. When a resistan

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

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 conne

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