Two large, thin metal plates are parallel and close to each other. On their inner faces, the……………..

Class 12th Physics, Question -Two large, thin metal plates are parallel and close to each other. On their inner faces, the plates have surface charge densities of opposite signs and of magnitude 17.7 × 10-22 C/m2 . What is electric field intensity E:

By
Komal Kohli
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Question 9:Two large, thin metal plates are parallel and close to each other. On their inner faces, the plates have surface charge densities of opposite signs and of magnitude 17.7 × 10-22 C/m2 . What is electric field intensity E:

(a) in the outer region of the first plate, and
(b) between the plates?

The correct answer is –

Surface charge density of plate A = +17.7 × 10–22 C/m2
Surface charge density of plate B = -17.7 × 10–22 C/m2
(a) In the outer region of plate I, electric field intensity E is zero.
(b)Electric field intensity E in between the plates is given by relation

E = ஢
బ Where,
଴ = Permittivity of free space = 8.85 x10-12 N-1 C2
m-2
∴ 𝐸 =
17.7 𝑥 10ିଶଶ
8.85 𝑥 10ିଵ
Therefore, electric field between the plates is 2.0 x 10-10 N/C

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