In a radio receiver, we generally use ………….. oscillator as a local oscillator
A. Crystal
B. Wien-bridge
C. Phase-shift
D. Hartley
Month: December 2018
A 50 kW carrier is to be amplitude modulated to a level of 85%. What is the carrier power after modulation ?
A 50 kW carrier is to be amplitude modulated to a level of 85%. What is the carrier power after modulation ?
A. 50 kW
B. 5 kW
C. 8 kW
D. 25 kW
As the modulation level is increased, the carrier power__________________?
As the modulation level is increased, the carrier power__________________?
A. Is increased
B. Remains the same
C. Is decreased
D. None of the above
A high Q tuned circuit will permit an amplifier to have high __________________?
A high Q tuned circuit will permit an amplifier to have high __________________?
A. Fidelity
B. Frequency range
C. Sensitivity
D. Selectivity
Man made noise are______________ variations?
Man made noise are______________ variations?
A. Amplitude
B. Frequency
C. Phase
D. Both phase and frequency
If level of modulation is increased ______________ power is increased?
If level of modulation is increased ______________ power is increased?
A. Carrier
B. Sideband
C. Carrier as well as sideband
D. None of the above
Demodulation is done in ________________?
Demodulation is done in ________________?
A. Receiving antenna
B. Transmitter
C. Radio receiver
D. Transmitting antenna
In radio transmission, the medium of transmission is ________________?
In radio transmission, the medium of transmission is ________________?
A. Space
B. An antenna
C. Cable
D. None of the above
In TV transmission, picture signal is ______________ modulated?
In TV transmission, picture signal is ______________ modulated?
A. Frequency
B. Phase
C. Amplitude
D. None of the above
In a radio receiver, noise is generally developed at _______________?
In a radio receiver, noise is generally developed at _______________?
A. IF stage
B. Receiving antenna
C. Audio stage
D. RF stage