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

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

3. 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

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

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

5. 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

6. 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

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

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

8. In an AM wave useful power is carrier by ______________?

   A. Carrier
   B. Sidebands
   C. Both sidebands and carrier
   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. The signal voltage induced in the aerial of a radio receiver is of the order of_____________?

    A. mV
    B. µV
    C. V
    D. None of the above