Part a: how many excess electrons must be distributed uniformly within the volume of an isolated plastic sphere 26.0cm in diameter to produce an electric field of 1500 n/c just outside the surface of the sphere? part b: what is the electric field at a point 13 cm outside of the surface of the sphere?

Q = 28.17 x 10⁻¹⁰ C

E= 375 N/C

Explanation:

Let Q be the charge on plastic sphere.

Field on the surface =k x charge / radius²

Putting the values we get

Q = 28.17 x 10⁻¹⁰ C

No of electrons = Charge / charge on one electron

=

= 7 x 10¹⁰

Electric field at 13 cm

=

E= 375 N/C

where’s the list ? the question is incomplete