Technician exam question T9A05

WhyShortening a dipole antenna increases its resonant frequency. A dipole's resonant frequency rises as the antenna is made physically shorter, since a shorter wire resonates at a shorter wavelength, and shorter wavelength means higher frequency, answer C. Lengthening it (A) lowers resonant frequency instead, and inserting coils (B) or capacitive end loading (D) are both techniques used to electrically lengthen an antenna, which lowers its resonant frequency rather than raising it.