Question

A $25\text{m}$ long antenna is mounted on an antenna tower. The height of the antenna tower is $75\text{m}$. The wavelength (in metres) of the signal transmitted by this antenna would be:

• A. $200$
• B. $400$
• C. $100$
• D. $300$

Answer 1

The correct option is C $100$

Given that, length of the antenna: $H=25\text{m}$
As we know, $\lambda =4H$
$\therefore \lambda =4\times 25$
or $\lambda =100\text{m}$
Hence, option (c) is correct.