on each plate. The punten are o Brnm apart. a) Find the electric field magnitude
ID: 1998648 • Letter: O
Question
on each plate. The punten are o Brnm apart. a) Find the electric field magnitude generated in redon between the p the direction of the the electric field. tes. Indicate b) Find the surface charge density on each plate. c) Calculate the potential energy stored in the capacitor. d) If a charged particle moves between the p in direction partllel to the plates, what e) Bonus Question: If one inserts a dielectric material between the plates, do the capacitance of the capacitor increase or decrease? Explain few words. What happens in to the energy store in the capacitor in this case? Explain.Explanation / Answer
(A) V = Q / C = (0.2 x 10^-6) / (0.5 x 10^-12)
V = 4 x 10^5 volt
E = V/ d = 4 x 10^5 / (0.8 x 10^-3 )
E = 5 x 10^8 V/m
(B) E = sigma / e0
sigam = 4.43 x 10^-3 C/m^2
(C) U = Q^2 / 2 C = 0.04 J
(D) field is in perpendicular to the plates towards -Q from +Q.
so Ngative charge will move towards +q plate
and +ve charge will move towards the -q plate
hence electric PE will decreasse.
Ans : Loss
(e) C new = k C
where k is dieletric constant of material.
that greater than 1.
hence capacitance will increase.
and U = Q^2 / 2 C
Q is constant and C increases so energy stored will decrease.
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