Commonly used terms in electronic communication system - class-XII
Description: commonly used terms in electronic communication system | |
Number of Questions: 26 | |
Created by: | |
Tags: communication system electromagnetic waves and communication system communication systems physics |
Generation, propagation and detection of electromagnetic waves is the basis of
The attenuation of a signal is compensated by
A transducer used at the transmitting end, serves the purpose of converting
During the process of modulation the RF wave is called
Loudspeaker is a transducer used at
A transducer used at the transmitting end, serves the purpose of converting
Reception of information involves
Main function of the RF amplifiers in a superheterodyne receiver is to
A carbon microphone is best used in a
"Man-made" noise can come from:
Thermal noise is generated in:
Long distance short-wave radio broadcasting uses:
A $8\ kHz$ communication channel has an $SNR$ of $30\ dB$. If the channel bandwidth is doubled, keeping the signal power constant, the $SNR$ for the modified channel will be
A signal of frequency 20 kHz and the peak voltage of 5 Volt is used to modulate a carrier wave of frequency 1.2 MHz and peak voltage 25 Volts. Choose the correct statement.
Assertion(A): The microphone acts as a transducer.
Reason(R) : In radio communication, microphone is used to convert sound signal into electrical signal.
Match the following:
Name of device | Usage |
a. Antenna | e. sends out information |
b. Transmitter | f. picks up information |
c. Receiver | g. converts energy in one form to another form |
d. Transducer | h. radiates signal |
i. recieves signal |
To double the covering range of a TV transmittion tower, its height should be multiplied by:
The waves emitted by a radio transmitter are
Three amplifiers $X , Y$ and $Z$ are connected in series.If the voltage gains of $X , Y$ and $Z$ are $10,20$ and $30$ respectively and the input signal is 1 mV peak value,then what is the output signal voltage (peak value,dc supply voltage is $10\mathrm { V }$ ?
Which signal will be heard first ?
During the process of transmission and reception, the signal gets deteriorated due to
Which of the following is not a part of receiver?
In television transmission, the light from the object is converted into signals called:
The RF channel in a radio transmitter produces :
The range of frequency of audio signal is __________.
What will be the image frequency of an FM radio receiver that is tuned to 91.6 MHz broadcast station?