A potential difference of 220 V is appli...

A potential difference of 220 V is applied across a rheostat of `12000Omega`. The voltmeter V has a resistance of `6000Omega` and distance BC is one - fourth of the distance from A to B. The error in the reading of voltmeter is approximately -

`27%`

`10%`

`40%`

`15%`

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