E9B07:What is the difference in radiated power between a lossless antenna with gain and an isotropic radiator driven by the same power?
Direct answer summary (2024-2028 NCVEC pool)
The official correct answer for E9B07 is They are the same.
The key fact is They are the same. Match that fact to the exact condition in the question; the other choices describe a different rule, band, component, or operating situation.