Question
An electromagnetic wave can be produced when the charge is

Answer

  1. Both (a) and (c)
Explanation: 
An accelerated charge is the source of electromagnetic waves (EMWs). When the charge is in a circular motion, the direction of its velocity continuously changes and thus it is in accelerated motion and produces EMWs. A charge falling in an electric field is accelerated by the electric force and thus produces EMWs.

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