Question

The value of N in shunt equalizer is?

(a) 1+ X1^2/Ro^2

(b) X1^2/Ro^2

(c) 1+ Ro^2/X1^2

(d) Ro^2/X1^2

I had been asked this question in an international level competition.

This question is from Shunt Equalizer in chapter Filters and Attenuators of Network Theory

Answer 1

Correct answer is (c) 1+ Ro^2/X1^2

Easiest explanation: The N is defined as the ratio of input power to the output power. N=Pi/Pl=(Vmax^2/4Ro)/((Vmax^2 X1^2)/4Ro(Ro^2+X1^2))=1+ Ro^2/X1^2.