Question

The Reciprocity Theorem is valid for ___________

(a) Non-Linear Time Invariant circuits

(b) Linear Time Invariant circuits

(c) Non-Linear Time Variant circuits

(d) Linear Time Variant circuits

This question was addressed to me in an interview.

The origin of the question is Advanced Problems on Reciprocity Theorem in section Useful Theorems in Circuit Analysis of Network Theory

Answer 1

Correct option is (b) Linear Time Invariant circuits

To elaborate: A reciprocal network comprises of linear time-invariant bilateral elements. It is applicable to resistors, capacitors, inductors (including coupled inductors) and transformers. However, both dependent and independent sources ate not permissible.