If both the length of an antenna and the wavelength of the s... | PHYSICS - MODULATION AND IT'S NECESSITY | SolveeIt | Solveeit

Today, June 18

Question

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

Answer

Remains constant

Explanation

Solution

: Power radiated by the antenna is proportional to $\left( \frac{1}{\lambda} \right)^{2}$ . When both the length of the antenna l and wavelength of the signal $\lambda$ are doubled, the power radiated by the antenna remains constant