Positive charge q is given to each plate of a parallel plate air capacitor having area of each plate A and separation between them, d. Then find
(i) Capacitance of the system.
(ii) Charges appearing on each surface of plates
(iii) Electric field between the plates
(iv) Potential difference between the plates
(v) Energy stored between the plates
Text Solution
Verified by ExpertsCHECK THE SOLUTION.
(i) C = 
(ii) on outer surfaces charge = q
on inner surfaces charge = 0
(iii) E = 0
(iv) Δ V = 0
(v) U = 0
Sol. (i) C = 
Capacitance is independent of charge stored
(ii)

on outer surfaces charge =
=
= q
on inner surfaces charge =
=
= 0
(iii) E = 0
electric field due to charges on outer surfaces cancel each other
(iv) Δ V = 0
becouse electric field between the plates is zero
(v) U = 0
becouse electric field between the plates is zero
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