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Question 20197
JEE Physics · Hard

Electromagnetic Waves and Wave Optics: EM Waves — Source MCQ

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EM Waves — SourceHardQuestion 20197

Question

EM waves are produced by:
  1. A
    Any stationary charge
  2. B
    Any moving charge at constant velocity
  3. C
    Accelerating charges or oscillating electric dipoles
    Correct
  4. D
    Only by radioactive nuclei

Correct answer

Accelerating charges or oscillating electric dipoles

Explanation

Accelerating charges radiate electromagnetic energy. An oscillating electric dipole (alternating current in an antenna) creates oscillating E and B fields that propagate outward as EM waves. Constant-velocity charges do not radiate.

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