The Polytechnic Classes(official) 🎓
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In a transmitter ……………. oscillator is used
Anonymous Quiz
34%
Hartley
27%
RC phase-shift
7%
Wien-bridge
33%
Crystal
In India, ……………. modulation is used for radio transmission
Anonymous Quiz
52%
Frequency
39%
Amplitude
7%
Phase
2%
None of the above
In an AM wave useful power is carrier by ………….
Anonymous Quiz
20%
Carrier
43%
Sidebands
36%
Both sidebands and carrier
0%
None of the above
In amplitude modulation, bandwidth is ……………. the audio signal frequency
Anonymous Quiz
9%
Thrice
26%
Four times
61%
Twice
4%
None of the above
In amplitude modulation, the ………… of carrier is varied according to the strength of the signal.
Anonymous Quiz
65%
Amplitude
24%
Frequency
8%
Phase
3%
None of the above
Overmodulation (amplitude) occurs when signal amplitude is …………. carrier amplitude
Anonymous Quiz
21%
Equal to
25%
Less than
53%
Greater than
1%
None of the above
In an AM wave, the majority of the power is in …………….
Anonymous Quiz
20%
Lower sideband
42%
Upper sideband
38%
Carrier
0%
None of the above
At 100% modulation, the power in each sideband is ………………… of that of carrier
Anonymous Quiz
36%
50%
17%
40%
19%
60%
27%
25%
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