In the circuit shown in the below figure, the potential difference between B and D is zero. The unknown resistance X is of

In the circuit shown in the below figure, the potential difference between B and D is zero. The unknown resistance X is of

  1. A

    4  Ω

  2. B

    2  Ω

  3. C

    3  Ω

  4. D

    E.m.f. of a cell is required to find the value of X

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    Solution:

    By balanced Wheatstone bridge condition, 16X=40.5

        X=84=2  Ω

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