Related Questions

The lower and upper cut off frequencies are also called ___________ frequencies
A Sideband
B Resonant
C Half-resonant
D Half-power
A band-stop filter passes frequencies between its lower and upper critical frequencies and rejects all others.
A True
B False
Frequencies above ___________ kHz are called radio frequencies
A 2
B 10
C 50
D 200
Wire-wound resistors are unsuitable for use at high frequencies because they
A Create more electrical noise
B Are likely to melt under excessive eddy current heat
C Consume more power
D Exhibit unwanted inductive and capacitive effects
Computers cannot communicate with each other directly over telephone lines because they use digital pulses whereas telephone lines use analog sound frequencies. What is the name of the device which permits digital to analog conversion at the start of a long distance transmission?
A Interface
B Modem
C Attenuation
D Teleprocessor
E None of the above
What do you call an attenuation that occurs over many different wavelengths of the carrier?
A Rayleigh fading
B Ricean fading
C Wavelength fading
D Slow fading
In microwave communication links, when fading due to rain attenuation occurs then technique adopted for solving the problem would include
A Antenna replacement and feed correction
B Amplitude timing and phase correction
C Polarization shifting and code diversity
D Path diversity and frequency diversity
The attenuation in waveguide above to cut off frequency
A Very high
B Very low
C Zero
D Infinite
The spectral region of the electromagnetic radiation which passes through the atmosphere without much attenuation is known as:
A Ozone hole
B Atmospheric window
C Ozone window
D Black hole
Lag compensation permits a high gain at low frequencies.
A True
B False

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