Which noise is important at high frequency?
Which one of the following noise becomes of great importance at high frequencies? Explanation: If the time taken by electrons to travel from emitter to collector becomes comparable to the period of the signal which is amplified which is only possible at high frequencies called transit time.
Which of the following type of noise assume greater importance at high frequency?
At high frequencies time period of wave and transit time become comparable. This discussion on Which of the following types of noise assumes greater importance at high frequencies? a)Transit time noiseb)Shot noisec)Impulse noised)Random noiseCorrect answer is option ‘A’.
Why does noise increase with frequency?
The higher the frequency waves oscillate, the higher the pitch of the sound we hear. As you see, sound frequency is determined by the way in which sound waves oscillate whilst travelling to our ears, meaning that they alternate between compressing and stretching the medium, which in most cases is air.
Which of the following noise becomes important at microwave frequencies Mcq?
Defence Question At high frequencies, such as microwave frequencies, transit time noise becomes a very significant concern.
Which gets less affected by noise?
3. Which gets less affected by noise? Explanation: Error detection is less affected by noise.
At which point the noise is most likely to affect the signal in a communication system?
– Noise is an unwanted as well as a disturbing signal which interferes with the main signal and corrupts the parameters of the signal. It is most likely to be entered at the channel and therefore affects the signal in the transmission line.
What type of frequencies are too high to be heard by humans?
The commonly stated range of human hearing is 20 to 20,000 Hz. Under ideal laboratory conditions, humans can hear sound as low as 12 Hz and as high as 28 kHz, though the threshold increases sharply at 15 kHz in adults, corresponding to the last auditory channel of the cochlea.
What is double minima method?
The measurement of high VSWR whose value is greater than 10 can be measured by a method called the double minimum method. In this method, the reading at the minimum value is taken, and the readings at the half point of minimum value in the crest before and the crest after are also taken.
What is frequency range of microwave?
Radio waves and microwaves are a form of electromagnetic radiation with operating frequencies ranging from 30 to 300 MHz and 300 MHz to 300 GHz, respectively . Different microwave applications and technologies will use certain frequency band to avoid frequency interference.
What kind of noise is at high frequencies?
One of the following types of noise becomes of great importance at high frequencies. It is the 2. Indicate the false statement. a. HF mixers are generally noisier than HF amplifiers. b. Impulse noise voltage is independent of bandwidth.
How to choose the best answer for a noise question?
Choose the letter of the best answer in each questions. 1. One of the following types of noise becomes of great importance at high frequencies. It is the 2. Indicate the false statement. a. HF mixers are generally noisier than HF amplifiers. b. Impulse noise voltage is independent of bandwidth.
Which is a typical source of natural noise?
Typical sources of natural noise tend to be broadband, that is all frequencies from DC to very high indeed. The electrical noise produced by resistors, Johnson noise, has a flat frequency spectrum from DC to very high.
Which is noisier a HF mixer or an HF amplifier?
HF mixers are generally noisier than HF amplifiers. b. Impulse noise voltage is independent of bandwidth. c. Thermal noise is independent of the frequency at which it is measured. d. Industrial noise is usually of the impulse type. 3. The value of a resistor creating thermal noise is doubled.