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Question 31488
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Electrostatics: Electrostatic Shielding MCQ

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Electrostatic ShieldingHardQuestion 31488

Question

Why is a conducting shell an ideal Faraday cage?
  1. A
    It absorbs external fields
  2. B
    E = 0 inside conductor — induced charges rearrange to exactly cancel external field
    Correct
  3. C
    It is made of good insulator
  4. D
    Charge accumulates uniformly

Correct answer

E = 0 inside conductor — induced charges rearrange to exactly cancel external field

Explanation

External field causes charge redistribution on the outer surface. This induced charge creates a field inside that exactly cancels the external field. E = 0 inside regardless of external field strength.

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