Physics Alternating Current PMDC Conceptual Practice
PMDC Verified Question 12 of 127
Electromagnetic waves are physically generated by the action of:
A
Oscillating electric charges and their fields
B
Neutral particles moving at high speed
C
Stationary electric charges
D
Heat transfer conduction
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option A: Oscillating electric charges and their fields
Concept:

The creation of electromagnetic waves requires a time-varying electromagnetic field.

Solution:

A stationary charge creates only a static electric field. A charge moving at a constant speed creates both a constant electric and magnetic field.

However, when a charge accelerates or oscillates, it creates a time-varying electric field. According to Maxwell's equations, a changing electric field induces a changing magnetic field, and vice versa. This self-propagating ripple travels through space as an electromagnetic wave.

Why other options are incorrect:

  • Stationary charges cannot produce magnetic fields or waves.


  • Neutral particles (like neutrons) do not carry electric fields and cannot generate EM waves through acceleration.

Quality & Fidelity Assurance: Every question on BeambePrep is rigorously curated against the official PMDC syllabus with zero filler, zero out-of-syllabus content, and zero typos. When an authentic past paper originally contained a historical mistake or ambiguity from the examining board (such as UHS or NUMS), BeambePrep faithfully reflects the original paper while detailing the nuance and scientific consensus in the autopsy above.

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