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WorksheetsAmplitude modulation 1
Total questions: 12
Worksheet time: 6mins
Amplitude modulation is
Change in amplitude of the carrier according to modulating signal
Change in frequency of the carrier according to modulating signal
Change in amplitude of the modulating signal according to carrier signal
Change in amplitude of the carrier according to modulating signal frequency
The AM spectrum consists of
Carrier frequency
Upper side band frequency
Lower side band frequency
All of the above
The circuit which is used to produce the amplitude modulation is______
Duplexer
Modulator
Amplifier
Mixer
What is the line connecting the positive and negative peaks of the carrier waveform called?
Peak line
Maximum amplitude ceiling
Envelope
Modulation index
What is the reference line for the modulating signal?
Zero line
Carrier peak line
Modulated peak line
Un-modulated peak line
What happens when the amplitude of the modulating signal is greater than the amplitude of the carrier?
Decay
Distortion
Amplification
Attenuation
The ratio between the modulating signal voltage and the carrier voltage is called?
Amplitude modulation
Modulation frequency
Modulation index
Ratio of modulation
When does over-modulation occur?
Modulating signal voltage < Carrier voltage
Modulating signal voltage > Carrier voltage
Modulating signal voltage = Carrier voltage
Modulating signal voltage =0
What is the condition for greatest output power at the transmitter without distortion?
Modulating signal voltage > Carrier voltage
Modulating signal voltage < Carrier voltage
Modulating signal voltage = Carrier voltage
Modulating signal voltage = 0
What is the modulation index value if Vmax=5.9v and Vmin=1.2v?
0.5
0.662
0.425
0.14
Which of the following modulating signal voltage would cause over-modulation on a carrier voltage of 10v?
9.5
9.99
10
12
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?
2.35v
2.12v
1.85v
3.21v
