Question

The LC product of a tuned amplifier circuit require to generate a carrier wave of 1 MHz for amplitude modulation is
A. `1.5xx10^(-14)s`
B. `1.2xx10^(-12)s`
C. `3.2xx10^(-12)s`
D. `2.5xx10^(-14) s`

Answer 1

Correct Answer - D
Frequency of tuned amplifier is
`v=(1)/( 2pisqrt(LC))`
As per question, `v=1 MHz=10^(6)Hz`
or `10^(6)=(1)/(2pisqrt(LC))` or `LC=(1)/(4pi^(2)(10^(6))^(2))=2.5xx10^(-14)s`