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Out of the following options which one can be used to produce a propagating electromagnetic wave?

Asked in NEET 2016 Phase-1 · Sources: the accelerated charge and Hertz

Answer: (2) An accelerating charge

Step-by-step solution

Radiation needs fields that detach from their source and travel on their own.

A stationary charge has only a static electric field; a charge in uniform motion adds a steady

magnetic field, but both fields simply move with the charge.

Acceleration makes the field lines kink, and that kink travels outward at c as an

electromagnetic wave.

So an accelerating charge is the source.

Why the other options are wrong

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