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KCET2021PhysicsCurrent Electricity

In the given arrangement of experiment on meter bridge, if A D corresponding to null deflection of the galvanometer is X , what would be its value if the radius of the wire A B is doubled?

Options

  1. AX
  2. BX 4
  3. C4 X
  4. D2 X

Correct answer

A. X

Step-by-step solution

In a meter bridge, balancing length of the wire is independent of the area of cross-section of the wire. So, if the radius of wire A B is doubled, the balancing length will still be X only.

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