Question

The principle of homogeneity and superposition  are applied to:

(a) Linear time invariant systems

(b) Nonlinear time invariant systems

(c) Linear time variant systems

(d) Nonlinear time invariant systems

I have been asked this question in unit test.

My doubt stems from Transfer Functions in chapter Mathematical Models of Physical Systems of Control Systems

Answer 1

Correct choice is (c) Linear time variant systems

For explanation I would say: Superposition theorem states that for two signals additivity and homogeneity property must be satisfied and that is applicable for the LTI systems.