Question

Figure of merit is ________

(a) Ratio of output signal to noise ratio to input signal to noise ratio

(b) Ratio of input signal to noise ratio to output signal to noise ratio

(c) Ratio of output signal to input signal to a system

(d) Ratio of input signal to output signal to a system

This question was addressed to me during an interview.

The origin of the question is Receiver topic in section Elements of Communication System of Analog Communications

Answer 1

Right answer is (a) Ratio of output signal to noise ratio to input signal to noise ratio

To explain: Figure of merit is a numerical quantity based on the characteristic of system that represents a measure of efficiency or effectiveness. It is defined as the ratio of output signal to noise ratio to input signal to noise ratio.