In an AM wave useful power is carrier by ______________?

Related Mcqs:

1. 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

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

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

3. In an AM wave, the majority of the power is in _____________?

   A. Lower sideband
   B. Upper sideband
   C. Carrier
   D. None of the above

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

   A. Amplitude
   B. Frequency
   C. Phase
   D. None of the above

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

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

6. 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

7. 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

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

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

9. If level of modulation is increased ______________ power is increased?

   A. Carrier
   B. Sideband
   C. Carrier as well as sideband
   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