A diode detector is used to detect an amplitude modulated wave of `60%` modulation by using a condense of capacity `250` picofarad in parallel with a load resistance `100` kilo ohm find the maximum modulated which could be find the maximum modulated frequency which could be detected by it

Options

A. `10.62 kHz`
B. `5.31 MHz`
C. `5.31` kHz
D. `10.62` MHz

Answer

A

Explanation

The maximum frequency which can be detected is
`v=(1)/(2pim_(a)tau)`
where `tau=CR`
Here, `C=250` pico farad `=250xx10^(-12)` farad
`R=100` kilon ohm =`100xx^(3)` ohm
`m_(a)=0.6`
`:.v=(1)/(2pixx0.6xx250xx10^(-12)xx100xx10^(3))`