Potentiometer wire of length 1 m is conn...

Potentiometer wire of length `1 m` is connected in series with `490 Omega` resistance and `2 V` battery. If `0.2 mV/cm` is the potential gradient, then resistance of the potentiameter wire is approximately

`4.9Omega`

`7.9Omega`

`5.9Omega`

`6.9Omega`

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