E9B11:What is a disadvantage of decreasing the number of wire segments in an antenna model below 10 segments per half-wavelength?

Direct answer summary (2024-2028 NCVEC pool)

The official correct answer for E9B11 is The computed feed point impedance may be incorrect.

The key fact is The computed feed point impedance may be incorrect. Match that fact to the exact condition in the question; the other choices describe a different rule, band, component, or operating situation.