Out of the following options which one cannot be used to produce a propagating electromagnetic wave?
Text Solution
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To produce electromagnetic (EM) waves, there must be a time-varying electric field, which occurs only when a charge is accelerating.
Now check each option carefully:
A charge moving with constant velocity
produces steady fields, no changing fields, so no EM wave.
A stationary charge
produces only static electric field, no EM wave.
A chargeless particle
has no electric field at all, so no EM wave.
An accelerating charge
produces EM waves
Hence, the ones that cannot produce EM waves are A, B, and C.
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