A solid conducting sphere of radius a is centered on the origin, and carries a total charge Q1. Concentric with this sphere is a conducting spherical shell of inner radius b and outer radius c,which carries a total charge Q2.The values of all parameters are given in the figure below.
Q1= -4 µC Q2=+5µC a=2cm b=6cm c=7cm
1. Calculate the magnitude of the electric potential difference between the radius r=b(the inner surface of the conducting shell ) and the origin
2.If the inner conducting sphere were replaced with an insulating sphere having the same charge Q1 distributed uniformly throughout its volume,the magnitude of the potential difference IVb-V0I would?
increase decrease or stay the same?