Related Questions

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
If level of modulation is increased ___________ power is increased
A Carrier
B Sideband
C Carrier as well as sideband
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
As the modulation level is increased, the carrier power ___________
A Is increased
B Remains the same
C Is decreased
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
Which of the following represents the correct set of modulation classification?
A Frequency, time period
B Frequency, amplitude
C Amplitude, wavelength
D Wavelength, frequency
Which of the following performs modulation and demodulation?
A coaxial cable
B modem
C fiber optic
D satellite
In Pulse Code Modulation system
A Large bandwidth is required
B Quantising noise can be overcome by companding
C Quantising noise can be reduced by decreasing the number of standard levels
D Suffers from the disadvantage of its incompatibly with TDM

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