Answer:
The excess charge is
Explanation:
From the question we are told that
The diameter is
The potential of the surface is
The radius of the sphere is
substituting values
The potential on the surface is mathematically represented as
Where k is coulomb's constant with value
given from the question that there is no other charge the Q is the excess charge
Thus
substituting values
Explanation:
(A) Electric field for the parallel plate capacitor is given by :
It is clear that the electric field does not depend on the separation of the plates.
(B) The relation between the electric field and the electric potential is given by :
d is the separation between plates. So, if the separation of the plates is increased, the potential difference increases.
(C) The capacitance of the parallel plate capacitor is given by :
So, the capacitance decreases when the separation of the plates is increased.
(D) The energy stored in the capacitor is given by :
So, the energy stored in the capacitor is increased when the separation of the plates is increased.