An `L-c` resonant circuit contains a `200 pF` capacitor and a `200muH` inductor. It is into oscillation coupled to an antenna. The wavelength of the radiated electromagnetic waves is

Options

A. `377 mm`
B. `377 m`
C. `377 cm`
D. `3.77 cm`

Answer

B

Explanation

Frequency of `L-C` oscilaltion is
`v = (1)/(2pisqrt(LC)) = (1)/(2 xx 31.4sqrt(200 xx 10^(-6) xx 200 xx 10^(-12)))`
`= 0.0796 xx 10^(7) Hz`
So, wavelength `lambda = (c)/(v) = (3 xx 10^(8))/(0.0796 xx 10^(7)) = 377 m`