Resistances in the two gaps of a meter bridge are 10 ohm and 30 ohm, respectively. If the resistances are interchanged the balance point shifts by

Resistances in the two gaps of a meter bridge are 10 ohm and 30 ohm, respectively. If the resistances are interchanged the balance point shifts by

  1. A

    33.3 cm

  2. B

    66.67 cm

  3. C

    25 cm

  4. D

    50 cm

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    Solution:

    S=100ll  .RInitially,  30=100ll×  10    l=25  cmFinally,  10=100ll×  30    l=75  cm

    So, shift = 50 cm.

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