A 2Omega resistor is connected in series...

A `2Omega` resistor is connected in series with `R Omega` resistor. This combination is connected across a cell. When the potential difference across `2 Omega` resistor is balanced on potentiometer wire, null point is obtained at length of 300cm. When the same procedure is repeated for `R Omega` resistor, null point is obtained at length 350cm, value of R is

2.33 ohm

3.53 ohm

4.6 ohm

5 ohm

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