Amplitude Modulation and Modulation Index MCQ

Test your knowledge with important Amplitude Modulation and Modulation Index MCQ and their applications. These MCQs are beneficial for competitive exams too. Explore 30 + more Amplitude Modulation and Modulation Index MCQs at Bissoy

• What is the modulating signal voltage if the maximum and the minimum voltages on the wave was observed to be 5.9v and 1.2v respectively?
  ক

  2.35v

  খ

  2.12v

  গ

  1.85v

  ঘ

  3.21v
• Which of the following modulating signal voltage would cause over-modulation on a carrier voltage of 10v?
  ক

  9.5

  খ

  9.99

  গ

  10

  ঘ

  12
• What is the modulation index value if Vmax=5.9v and Vmin=1.2v?
  ক

  0.5

  খ

  0.662

  গ

  0.425

  ঘ

  0.14
• What is the condition for greatest output power at the transmitter without distortion?
  ক

  Modulating signal voltage > Carrier voltage

  খ

  Modulating signal voltage < Carrier voltage

  গ

  Modulating signal voltage = Carrier voltage

  ঘ

  Modulating signal voltage = 0
• When does over-modulation occur?
  ক

  Modulating signal voltage < Carrier voltage

  খ

  Modulating signal voltage > Carrier voltage

  গ

  Modulating signal voltage = Carrier voltage

  ঘ

  Modulating signal voltage =0
• What is the percentage of modulation if the modulating signal is of 7.5V and carrier is of 9V?
  ক

  100

  খ

  91

  গ

  83.33

  ঘ

  0
• The ratio between the modulating signal voltage and the carrier voltage is called?
  ক

  Amplitude modulation

  খ

  Modulation frequency

  গ

  Modulation index

  ঘ

  Ratio of modulation
• What is the circuit used for producing AM called?
  ক

  Modulator

  খ

  Transmitter

  গ

  Receiver

  ঘ

  Duplexer
• What is the effect of distortion?
  ক

  Total information loss

  খ

  Error information

  গ

  Attenuated information

  ঘ

  Amplified information
• What happens when the amplitude of the modulating signal is greater than the amplitude of the carrier?
  ক

  Decay

  খ

  Distortion

  গ

  Amplification

  ঘ

  Attenuation
• What is the reference line for the modulating signal?
  ক

  Zero line

  খ

  Carrier peak line

  গ

  Modulated peak line

  ঘ

  Un-modulated peak line
• What is the line connecting the positive and negative peaks of the carrier waveform called?
  ক

  Peak line

  খ

  Maximum amplitude ceiling

  গ

  Modulation index

  ঘ

  Envelope
• In Amplitude Modulation, the instantaneous values of the carrier amplitude changes in accordance with the amplitude and frequency variations of the modulating signal.
  ক

  True

  খ

  False