A network is said to be linear, if and only if
- A. The response is proportional to the excitation function.
- B. The principle of superposition applies.
- C. The principle of homogeneity applies.
- D. The principles of superposition and homogeneity apply.
Answer: D. The principles of superposition and homogeneity apply.
Explanation: A linear network must satisfy both superposition (additivity) and homogeneity (scaling).