A tuned amplifier circuit is used to generate a carrier frequency of 2 MHz for the amplitude modulation. The value of `sqrt(LC)` is

Options

A. `(1)/(2pi xx 10^(6))`
B. `(1)/(2xx10^(6))`
C. `(1)/(3pi xx10^(6))`
D. `(1)/(4pi xx 10^(6))`

Answer

D

Explanation

For transistor as an oscillator, `f=(1)/(2pi sqrt(LC))`
where, `f=2MHz =2xx10^(6)Hz and sqrt(LC)=?`
`rArr sqrt(LC)=(1)/(2pif)=(1)/(2pi xx 2xx10^(6))=(1)/(4pi xx 10^(6))`