Physics > Electrostatics And Current Electricity > Current Electricity

A wire of length 10 cm and radius $\sqrt{7} \times 10^{-4}\ \text{m}$ is connected across the right gap of a meter bridge. When a resistance of $4.5\ \Omega$ is connected on the left gap by using a resistance box, the balance length is found to be at 60 cm from the left end. If the resistivity of the wire is $R \times 10^{-7}\ \Omega\text{m}$, then the value of $R$ is: