Question

In a metre bridge experiment , resistance box with 2 Ω is connected in the left gap and the unknown resistance S in the right gap. If the balancing length be 40 cm, value of S will be *
(a) 2 Ω
(b) 3 Ω
(c) 4 Ω
(d) 5 Ω​

Answer 1

Thus, by using balanced wheatstone bridge condition we, will obtain the value of unknown resistance 'S'. Hence, value of unknown resistance in the right gap 'S' is 3Ω. Therefore, Option (B) 3Ω is right answer.

This is the right ans

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