30 Questions
Which type of noise is directly generated from the sun's heat?
Solar Noise
What is another name for Cosmic Noise?
Black-Body Noise
Which type of noise is caused by random arrival of carriers at the output element of an electronic device?
Shot Noise
What is the primary source of Man-made Noise?
Communtators in motors/generators
What type of noise is associated with the movement of electrons within a conductor due to thermal agitation?
Thermal Noise
Which type of internally generated noise is caused by transit time of carriers within a device or circuit?
Transit Time Noise
What is electrical noise in a communication system?
Any undesirable electrical energy that falls within the passband of the signal
What does correlation imply in the context of noise?
A relationship between the signal and the noise
Which type of noise exists only when a signal is present?
Correlated noise
What is an example of external noise?
Static electricity due to lightning
At what frequencies is atmospheric noise relatively insignificant?
Above 30 MHz
What does extraterrestrial noise consist of?
Electrical signals from outside Earth's atmosphere
What is the bandwidth of an information signal?
The difference between the highest and lowest frequencies
Why must the bandwidth of a communications channel be wide enough?
To avoid signal distortion
What does Information Theory study focus on?
Efficient use of bandwidth in electronic communication systems
What does Information Capacity measure in a communication system?
The maximum data rate
What is a Binary Digit or bit used for?
To represent information digitally
What does Bit Rate measure?
Number of bits transmitted per unit time
What is the mathematical expression for rms noise voltage?
VN = 4𝑘𝑇𝐵𝑅
In the context of noise voltage, what does the variable 'B' represent?
System Bandwidth
For an electronic device operating at room temperature with a 10 kHz bandwidth, what is the thermal noise power measured in?
Watts and dBm
What does the signal-to-noise ratio (SNR) measure?
Relative strength of desired signal power to noise power
In the shot noise expression in = 2𝐵𝐼𝑞, what does 'I' represent?
DC Current
What is the noise figure defined as?
Ratio of S/N at the input to S/N at the output
What does a noise figure of 0 dB indicate in an ideal noiseless network?
No noise present
In the context of noise figure, what does a value greater than 1 signify?
Amplification of noise
What is the formula to calculate equivalent noise resistance (Req) in a network?
Req = Ra(F - 1)
For a transistor amplifier with S/N power ratio of 10 at the input and 5 at the output, what does the calculated transistor noise figure represent?
Amplification factor of noise
What does a high noise figure indicate in the context of amplifier performance?
Higher noise contribution
How does an increase in bandwidth affect the shot noise for a diode with a forward bias?
Increases the shot noise
Test your knowledge on the principles of communication systems in the field of Electronics and Communications Engineering. This quiz covers topics such as bandwidth, information signals, and communications channels.
Make Your Own Quizzes and Flashcards
Convert your notes into interactive study material.
Get started for free
