Home
Class 12
PHYSICS
The carrier freqeuncy of a station is 40...

The carrier freqeuncy of a station is 40 MHz. A resistor of 10k `Omega` and capacitor of CpF are available in the detector circuit. The possible value of C will be

A

12

B

8.2

C

5.6

D

All of these

Text Solution

Verified by Experts

The correct Answer is:
D
Here, `R=10kOmega=10xx10^(3)Omega`
`C=12pF=12xx10^(-12)F`
`v_(c)=40MHz=40xx10^(6)Hz=4xx10^(7)Hz`.
Time period of carrier frequency
`T_(c)=(1)/(v_(c))-(1)/(4xx10^(7))=2.5xx10^(8)s`
time constant of C-R circuit,
As `T_(c)lt tau`, therefore, circuit is good enough for detection All the values of C given in the options are possible.
Promotional Banner

Topper's Solved these Questions

  • COMMUNITCATION SYSTEMS

    NCERT FINGERTIPS|Exercise NCERT Exemplar|18 Videos

  • COMMUNITCATION SYSTEMS

    NCERT FINGERTIPS|Exercise Assertion And Reason|30 Videos

  • COMMUNITCATION SYSTEMS

    NCERT FINGERTIPS|Exercise Amplitude Modulation|20 Videos

  • ATOMS

    NCERT FINGERTIPS|Exercise Assertion And Reason|15 Videos

  • CURRENT ELECTRICITY

    NCERT FINGERTIPS|Exercise Assertion And Reason|15 Videos

Similar Questions

Explore conceptually related problems

The carrier frequency of a station is 40 MHz. A resistor of 10 kOmega and a capacity of 12 muF are available in the detector circuit, Is it good enough for detection? Explain.

The carrier frequency of a station is 50 MHz . A resistor of 10 k omega and a capacitor of 10 pF are available in the circuit . Is it good enough for detection ?

The tuning circuit of a radio receiver has a resistance of 50Omega , an inductor of 10 mH and a variable capacitor. A 1 MHz radio wave produces a potential difference of 0.1 mV. The values of the capacitor to produce resonance is ("Take "pi_(2) = 10)

In a diode AM detector with the output circuit consists of R= 1M Omega and C=1 pF would be more suitable for detecting a carrier signal of

In a diode AM detector with the output circuit consists of R= 1M Omega and C=1 pF would be more suitable for detecting a carrier signal of

A 0.2 k Omega resistor and 15 mu F capacitor are connected in series to a 220 V, 50 Hz ac source. The impadance of the circuit is

A voltage 10V and frequency 10^(3) HZ is applied to (1)/( pi )mu F capacitor is series with a resistor of 500 Omega . Find the power factor of the circuit and the power dissipated

A voltage 10V and frequency 10^(3) HZ is applied to (1)/( pi )mu F capacitor is series with a resistor of 500 Omega . Find the power factor of the circuit and the power dissipated

A series RCL circuit contains a 222 Omega resistor, a 1.40 muF capacitor, and a 0.125 H inductor. The 444 Hz ac generator in the circuit has an rms voltage of 208 V. What is the average electric power dissipated by the circuit?

An a.c. source of angular frequency omega is fed across a resistor R and a capacitor C in series. The current registered is I. If you the frequency of source is changed to omega//3 , maintaining the same voltage, current in the circuits is found to be halved. Caculate the ratio of reactance to resistance at the original frequency omega .