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In a experiment on metre bridge, if the ...

In a experiment on metre bridge, if the balancing length AC is 'x' what would be its value, when the radius of the metre bridge wire AB is doubled? Justify your answer.

A

There will be no change

B

Null point will shift to `L_(1)//2` point

C

Null point will shift to `2L_(1)` point

D

Null point will not be available

Text Solution

Verified by Experts

The correct Answer is:
A
For a balanced Meter Bridge `P//Q = L //(100-L_(1))`.
There is no parameter related to the radius of the wire. So, the null deflection of galvanometer does not depend on the radius of the wire. So, even if the radius of the wire is doubled, the null deflection of the galvanometer will not be changed.
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