Question

The degree of numerator polynomial in a transfer function may be as small as _________ independent of the degree of the denominator polynomial.

(a) 1

(b) 2

(c) 0

(d) 3

I have been asked this question in an interview for job.

This is a very interesting question from Properties of Transfer Functions in section S-Domain Analysis of Network Theory

Answer 1

The correct choice is (c) 0

To explain: The degree of numerator polynomial in a transfer function may be as small as zero, independent of the degree of the denominator polynomial and for the voltage transfer ratio and the current transfer ratio, the maximum degree of P(s) must be equal to the degree of Q(s).