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A potentiometer wire 10m long has a resi...

A potentiometer wire 10m long has a resistance of `40Omega`. It is connected in series with a resistances box and a 2 v storage cell. If the potential gradient along the wire is `0.01(V)/(m)` the resistance unplugged in the box is

A

`760Omega`

B

`260Omega`

C

`1060Omega`

D

`960Omega`

Text Solution

Verified by Experts

The correct Answer is:
A
`K=(E)/((R+R_(S))(R)/(L)`
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