Related Questions

As the modulation level is increased, the carrier power ___________
A Is increased
B Remains the same
C Is decreased
D None of the above
One of the advantages of base modulation over collector modulation of a transistor class C amplifier is
A Improved efficiency
B Better linearity
C High power output per transistor
D The lower modulating power requirement
In case of low level amplitude modulation system, the amplifiers following the modulated stage must be
A Class C amplifiers
B Linear devices
C Non-linear devices
D Harmonic devices
For a given carrier wave, maximum undistorted power is transmitted when value of modulation is
A 1
B 0.8
C 0.5
D 0
The output power of a transistor amplifier is more than the input power because the additional power is supplied by ___________
A Transistor
B Biasing circuit
C Collector supply VCC
D None of the above
Modulation is done in ___________
A Transmitter
B Radio receiver
C Between transmitter and radio receiver
D None of the above
In amplitude modulation, bandwidth is ___________ the audio signal frequency
A Thrice
B Four times
C Twice
D None of the above
In amplitude modulation, the ___________ of carrier is varied according to the strength of the signal.
A Amplitude
B Frequency
C Phase
D None of the above
Modulation refers to a low-frequency signal controlling the ___________
A Amplitude of the carrier
B Frequency of the carrier
C Phase of the carrier
D May be any of the above
In India, ___________ modulation is used for radio transmission
A Frequency
B Amplitude
C Phase
D None of the above

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