A total charge of 62 nC is uniformly distributed throughout a non-conducting sphere with a radius of 5.00 cm. The electric potential at r = 15.0 cm , relative to the potential far away, is:

2790 J/C

Explanation:

charge on sphere Q = 62 nC =

radius of the sphere r = 5.0 cm = 0.05 m

distance away from reference point d = 15.0 cm = 0.15 m

total distance of charge relative reference point R = r + d = 0.05 + 0.15 = 0.2 m

electric potential V is given as

where k = Coulumb's constant = kg⋅m³⋅s⁻⁴⋅A⁻²

=

V = 2790 J/C

if you already have the answer to (a), then just work out how many periods there are in 1 minute, and that's the answer to (c).

im sorry i dont know