How are electromagnetic waves produced?
a) an accelerating electric point charge (electron) emits electromagnetic waves.
b) a bar magnet moving in a strong electric field produces electromagnetic waves.
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c) a large electromagnet operated at very high voltages produces electromagnetic waves.
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d) a stable nucleus moving through a stable magnetic field produces electromagnetic waves.

The correct answer is option A, An accelerating electric point charge (electron) emits electromagnetic waves

Explanation:

An accelerating electric charged particle produces electromagnetic waves. The accelerating charged particle produces magnetic and electric field whose magnitude is changing continuously. Thus a changing electric field produces magnetic field and a changing magnetic field produces electric field. This changing electric and magnetic field produces electromagnetic wave which are able to move through a vacuum space and thus need no medium to travel

explanation: in any substance/object, the particles inside it (atoms/molecules) constantly move in random directions and with random speeds (this motion is called brownian motion). as a result, the particles have some kinetic energy (which is proportional to the temperature of the substance).

explanation:

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