Question

The area to be covered for TV telecast is doubled. Then, the height of the transmitting antenna will have to be

• A. doubled
• B. halved
• C. quadrupled
• D. kept unchanged

Answer 1

The correct option is A doubled

The relation between the height of the transmission antenna and the area covered by the TV telecast is given as:

$d_{max}=\sqrt{2R{H}_T}$

$\Rightarrow H_T\propto d_{max}^2\propto A$
Thus, if the area to be covered is to be doubled, the height of the antenna has to be doubled.