Download Aptitude Crack
img not found img not found

Communication Systems - Engineering

Q1:

Which of the following are useful in comparing the noise performance of receivers?
  1. Input noise voltage
  2. Noise figure
  3. Noise resistance
  4. Noise temperature
Select answer as per the following codes:

A 1, 2 and 3

B 1, 3 and 4

C 2, 3, 4

D 1, 2, 4

ANS:C - 2, 3, 4

Noise figure, noise resistance and noise temperature are useful quantities. Input noise voltage alone is not sufficient unless gain of amplifier stages is also known.