Two large conducting plates are placed parallel to each other with a separation of 2.00 cm between them. An electron starting from rest near one of the plates reaches the other plate in 2.00 microseconds. Find the surface charge density on the inner surfaces. Can you find out the charge density on outer surface?
Text Solution
Verified by ExpertsCHECK THE SOLUTION.
(0.505 × 10 –12 C/m 2 , No)
Sol. ∴ d = ut + 
at 2 [For motion with constant acceleration]
∴ d = 
at 2
or d = 
t 2 & E = 
∴ d = 
t 2 σ = 
= 
= 
= 0.503 × 10
–12 
charge density on outer surfaces of plates is equal in magnitude as well as in sign. So there is no contribution in electric field between the plates by charges on outer surfaces. So we cannot find out charge density on the outer surfaces.
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