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Free tnpsc model questions Online Test - MeritNotes
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Online Exam
No. of Questions :10
Remaining Time :
1. The energy of a wave increases with
(a)
amplitude
(b)
wavelength
(c)
frequency
(d)
none of the above
2. The process of modulation is carried out in
(a)
oscillator circuit
(b)
amplifier circuit
(c)
resonant circuit
(d)
modulator circuit
3. The efficiency of amplitude modulation is
(a)
zero
(b)
low
(c)
high
(d)
100%
4. The radio frequency amplifier in a simple radio receiver employs a _____ to amplify the selected radiowave.
(a)
tuned base circuit
(b)
modulator circuit
(c)
tuned parallel circuit
(d)
resonant circuit
5. In amplitude frequency lies in the audio range
(a)
four times the signal frequency
(b)
thrice the signal frequency
(c)
twice the signal frequency
(d)
equal to the signal frequency
6. Loudspeaker converts
(a)
sound signal into audio electrical signal
(b)
light energy into electromagnetic energy
(c)
electrical energy into electromagnetic energy
(d)
audio electrical signal into sound signal
7. In the process of demodulation what signal is extracted from the modulated wave?
(a)
Audio signal
(b)
Carrier signal
(c)
Low frequency signal
(d)
All the above
8. The frequency variation of the carrier wave depends upon the instantaneous
(a)
frequency of the signal
(b)
frequency of the carrier
(c)
amplitude of the carrier
(d)
amplitude of the signal
9. The process of the IF wave amplified using IF amplifier is maintained constant using
(a)
modulator
(b)
demodulator
(c)
limiter
(d)
regulator
10. Audio signals are carried by
(a)
low frequency radiowaves
(b)
voice frequencies
(c)
medium frequency radiowaves
(d)
high frequency radiowaves
