The superhetrodyne principle provides selectivity at ______________stage?

Related Mcqs:

1. Most of the amplification in a superhetrodyne receiver occurs at ______________stage?

   A. IF
   B. RF amplifier
   C. Audio amplifier
   D. Detector

2. In superhetrodyne receiver, the input at mixer stage is________________?

   A. IF and RF
   B. RF and AF
   C. IF and AF
   D. RF and local oscillator signal

3. In a superhetrodyne receiver, the difference frequency is chosen as the IF rather than the sum frequency because _________________?

   A. The difference frequency is closer to oscillator frequency
   B. Lower frequencies are easier to amplify
   C. Only the difference frequency can be modulated
   D. None of the above

4. Superhertodyne principle refers to_________________?

   A. Using a large number of amplifier stages
   B. Using a push-pull circuit
   C. Obtaining lower fixed intermediate frequency
   D. None of the above

5. If modulation is 100% then signal amplitude is ____________arrier amplitude?

   A. Equal to
   B. Greater than
   C. Less than
   D. None of the above

6. In a radio receiver, noise is generally developed at _______________?

   A. IF stage
   B. Receiving antenna
   C. Audio stage
   D. RF stage

7. Overmodulation (amplitude) occurs when signal amplitude is _____________ carrier amplitude?

   A. Equal to
   B. Greater than
   C. Less than
   D. None of the above

8. A 100 V carrier is made to vary between 160 V and 40 V by the signal. What is the modulation factor ?

   A. 3
   B. 6
   C. 5
   D. None of the above

9. As the modulation level is increased, the carrier power__________________?

   A. Is increased
   B. Remains the same
   C. Is decreased
   D. None of the above

10. In the above question, what is the power in sidebands?

    A. 8 kW
    B. 6 kW
    C. 06 kW
    D. 9 kW