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Question 31485
JEE Physics · Hard

Electrostatics: Energy Density MCQ

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Energy DensityHardQuestion 31485

Question

Total energy stored in the field of a uniformly charged sphere (charge Q, radius R):
  1. A
    3kQ²/(5R)
    Correct
  2. B
    kQ²/(2R)
  3. C
    kQ²/R
  4. D
    3kQ²/(10R)

Correct answer

3kQ²/(5R)

Explanation

U = (3/5)kQ²/R for a uniformly charged sphere (volume charge). For surface-charged shell: U = kQ²/(2R).

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