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Question 31559
JEE Physics · Medium

Capacitance: Energy in Electric Field MCQ

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

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Energy in Electric FieldMediumQuestion 31559

Question

A parallel-plate capacitor with E = 10⁶ V/m between plates and volume 1 cm³ stores energy:
  1. A
    4.43 mJ
  2. B
    44.3 μJ
  3. C
    4.43 μJ
    Correct
  4. D
    4.43 J

Correct answer

4.43 μJ

Explanation

u = ½ε₀E² = ½×8.85×10⁻¹²×10¹² = 4.43 J/m³. Volume = 10⁻⁶ m³. Energy = 4.43 μJ.

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