The resistance of each arm of the wheat...

The resistance of each arm of the wheat stone bridge is `10Omega`. A resistance of `10Omega` is connected in series with galvanometer then the equivalent resistance across the battery will be:-

`40 Omega`

`30 Omega`

`20 Omega`

`10 Omega`

Text Solution

Verified by Experts

The correct Answer is:

For the balanced wheatstone's network the addition of a resistance with the galvanometer does not change the balanced condition.
There are two parallel resistance branches, each of resistance `20 Omega therefore ` Effective resistance `= 10 Omega`.

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