Q. If both the length of an antenna and the wavelength of the signal to be transmitted are doubled, the power radiated by the antenna
A) Is doubled
B) Is halved
C) Remains constant
D) Is quadrupled
Explanation
(c) Power radiated by the antenna is proportional to $\left( \frac{l}{\lambda} \right)^{2}$. When both the length of the antenna $l$ and wavelength of the signal $\lambda$ are doubled, the power radiated by the antenna remains constant
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.