An infinitely long thin wire, having a uniform charge density per unit length of 5 nC/m, is passing through a spherical shell of radius 1 m, as shown in the figure. A 10 nC charge is distributed uniformly over the spherical shell. If the configuration of the charges remains static, the magnitude of the potential difference between points P and R, in Volt, is ________. [Given: In SI units 1/(4πε₀) = 9 × 10⁹, ln 2 = 0.7. Ignore the area pierced by the wire.]