In amplitude modulation, the _____________of carrier is varied according to the strength of the signal?

Related Mcqs:

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

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

2. A 50 kW carrier is to be amplitude modulated to a level of 85%. What is the carrier power after modulation ?

   A. 50 kW
   B. 5 kW
   C. 8 kW
   D. 25 kW

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

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

4. In amplitude modulation, bandwidth is ____________ the audio signal frequency?

   A. Thrice
   B. Four times
   C. Twice
   D. None of the above

5. 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

6. At 100% modulation, the power in each sideband is _____________ of that of carrier?

   A. 50%
   B. 40%
   C. 60%
   D. 25%

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

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

8. Modulation refers to a low-frequency signal controlling the ________________?

   A. Amplitude of the carrier
   B. Frequency of the carrier
   C. Phase of the carrier
   D. May be any of the above

9. When the modulating signal controls the frequency of the carrier, we get______________?

   A. Phase modulation
   B. Amplitude modulation
   C. Frequency modulation
   D. May be any one of the above

10. If Amin = 40 and Amax = 60, what is the percentage of modulation?

    A. 20 %
    B. 40 %
    C. 50 %
    D. 10 %