The length of Marconi antenna at a place is 0.75 m. What is the optimum transmission frequency?

Answer

100MHz.

Explanation

Here, `l = 0.75 m, v = ?`
As `lambda/4 = l :. lambda = 4l = 4 xx 0.75 m = 3.0m`
`v = c/lambda = ( 3xx 10^8)/3.0 = 10^8 Hz = 10^2 MHz`.