A potentiometer wire of 10 m length and ...

A potentiometer wire of 10 m length and 20 ohm resistance is connected in series with a resistance R ohms and a battery of emf 2V, negligible internal resistance, potential gradient on the wire is 0.16 millivolt/centimetre then R is ohm….

`50Omega`

`60Omega`

`230Omega`

`46Omega`

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