Multiple choice

Electromagnetic waves are emitted by an oscillating charge with

  1. zero acceleration

  2. non-zero acceleration

  3. constant velocity

  4. none of these
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Electromagnetic waves are produced by accelerated charges. An oscillating charge continuously changes its velocity and therefore has non-zero acceleration. According to Maxwell's equations, accelerated charges radiate electromagnetic energy. Constant velocity (zero acceleration) produces no radiation, as the charge is not accelerating.

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