Question

Which of the following statement is true?

(a) Random noise power is inversely proportional to bandwidth

(b) Flicker noise occurs at high frequency

(c) Noise mixers are caused by inadequate image frequency rejection

(d) A random voltage across a resistance cannot be calculated

The question was posed to me in a job interview.

I'd like to ask this question from Noise in AM in division Noise of Analog Communications

Answer 1

Correct answer is (c) Noise mixers are caused by inadequate image frequency rejection

The explanation is: Image frequency rejection is the ratio of intermediate frequency (IF) produced by desired input frequency to that which is produced by the image frequency.