JEE Physics · Hard

Electrostatics: Conductor Shielding MCQ

Solve this quality-checked JEE multiple-choice question, then review the correct answer and explanation.

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Conductor ShieldingHardQuestion 31433

Question

A conducting shell shields the interior from:
  1. A
    Internal charges only
  2. B
    External electric fields only
    Correct
  3. C
    Gravitational fields
  4. D
    Both internal and external fields

Correct answer

External electric fields only

Explanation

External field: charge redistributes on shell surface → E = 0 inside (shielding). But a charge inside the cavity induces surface charges and creates field inside — not shielded from internal sources.