In a detector, output circuit consists of `R = 10kOmega and C = 100 p F.` Calculate the frequency of carrier signal it can detect.

Options

A. ` gt gt 1 MHz `
B. ` 0.1 kHz `
C. `gt gt 1 GHz `
D. `10^(3) Hz `

Answer

A

Explanation

Time constant of the circuit `tau=RC=10^(4) xx 10^(-10)=10^(-6) s `
For demodulation , `(1)/(f_(c)) lt lt RC `
` or f_(c) gt gt (1)/(RC) or f_(c) gt gt (1)/(10^(-6))=10^(6)Hz `