
Communication systems
Authored by Year C
Physics
11th - 12th Grade
NGSS covered
Used 1+ times

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26 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The variation of either the amplitude or the frequency of the carrier wave called
Demodulation
Modulation
Bandwidth
Sideband
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
For this wave determine the frequency of carrier wave
50 Hz
10 Hz
10 kHz
100 kHz
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
For this wave determine the frequency of the information signal
10 kHz
5 kHz
100 Hz
200 kHz
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The variation with frequency f of the amplitude A of the transmitted wave is shown in Figure. For this transmission determine the wavelength of the carrier wave
33 km
30 cm
330 mm
110 km
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The variation with frequency f of the amplitude A of the transmitted wave is shown in Figure. For this transmission determine the bandwidth
900 kHz
918 kHz
18 kHz
909 Hz
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The variation with frequency f of the amplitude A of the transmitted wave is shown in Figure. For this transmission determine the maximum frequency of the transmitted audiosignal
900 kHz
9 kHz
18 kHz
909 Hz
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The signal-to-noise ratio at the receiver must not fall below 28 dB. Calculate the minimum input signal power to the receiver
0.45mW
0.36
0.23 mW
0.55 W
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