Technician exam question T3B03
Subelement T3, RADIO WAVE PROPAGATION· Group T3B
What are the two components of a radio wave?
- A.Impedance and reactance
- B.Voltage and current
- C.Electric and magnetic fields (correct answer)
- D.Ionizing and non-ionizing radiation
WhyA radio wave's two components are electric and magnetic fields. A radio wave is made up of an electric field and a magnetic field propagating together through space, answer C. Impedance and reactance (A) are circuit properties, not the wave itself; voltage and current (B) describe an electrical signal in a conductor, not a wave traveling through free space; and ionizing versus non-ionizing radiation (D) is a classification of radiation by energy level, not a description of a radio wave's two components.
Published 2026-08-28 · Last updated 2026-08-28 · Question text is verbatim from the 2026-2030 NCVEC Element 2 pool (public domain); the explanation above is original writing, see our methodology.
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