Power radiated by an antenna is directly proportional to (l – length of antenna, λ – wavelength of electromagnetic wave)
Answer & explanation
Correct answer: option 1
Power radiated by antenna is
\( P_r=\frac{\mu_0 \pi^2 I_0^2 l^2}{\lambda^2} \)
Then, \( P_r \propto\left(\frac{l}{\lambda}\right)^2 \)