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In the given circuit, no current is pass...

In the given circuit, no current is passing through the galvanometer. If the cross sectional diameter of the wire `AB` is doubled, then for null point of galvanometer, the value of `AC` would be:

A

`2X`

B

`X`

C

`(X)/(2)`

D

`3X`

Text Solution

Verified by Experts

The correct Answer is:
B
`L.C=(1)/(50)mm=0.02mm`
`M.S.R=3mm`
`C.S.R=31xx0.02mm=0.62 mm`
Zero eror correction` = -0.12mm`
So diameter `=3.50mm`
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