Q 12-08-218JEE MainJEE Main 2019 (12 Jan, Shift 2)Easy
To double the covering range of a TV transmitting tower, its height should be multiplied by:
Answer: (B) $4$
Range $d = \sqrt{2hR}$, so $d \propto \sqrt h$. To double $d$, the height must be multiplied by $4$.
Solution by Sreeraj P, M.Sc Physics