A potentiometer wire of length is connected in series with a resistance and a battery

PHYSICS · Subjective · CBSE · Physics · Current Electricity · Current Electricity

Problem

A potentiometer wire of length

1\text{ m}

is connected in series with a

490\,\Omega

resistance and a

2\text{ V}

battery. If

0.2\text{ mV cm}^{-1}

is the potential gradient, then the resistance of the potentiometer wire is approximately: