Question

Which of the following can be used to produce a propagating electromagnetic wave?

• A. Charge moving at a constant speed
• B. Chargeless particle
• C. Stationary charge
• D. An accelerating charge

Hint:

Electromagnetic waves are generated by accelerating charges, such as those in antennas or oscillators.

Answer 1

The Correct Option is D

Step 1: Understand the source of electromagnetic waves.
Electromagnetic waves are produced by accelerating charges.
This can happen when a charge moves back and forth or experiences acceleration, causing a disturbance in the electric and magnetic fields that propagates as an electromagnetic wave.
Step 2: Identify the correct option.
Only an accelerating charge can produce a propagating electromagnetic wave.
A stationary charge or charge moving at a constant speed does not create such waves.