Electrostatics

An infinitely long thin wire, having a uniform charge density per unit length of 5‌nC∕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

4πE0

=9×109,ln‌2=0.7 . Ignore the area pierced by the wire.]