alleryStart learning →SUPERPOSITION THEOREM applies to
Anon-linear circuits only
Blinear circuits with multiple sources
Ccircuits with capacitors only
DAC circuits only
Answer & Solution
Correct answer: B. linear circuits with multiple sources
1. SUPERPOSITION: in a LINEAR circuit with MULTIPLE sources, the response (voltage or current) at any element is the SUM of the responses due to each source acting ALONE (other sources deactivated).
2. To deactivate sources: voltage source → SHORT; current source → OPEN.
3. APPLIES to: resistors, ideal sources, AC circuits with linear impedances.
4. DOES NOT apply to non-linear circuits (diodes, transistors in non-linear regions).
5. DOES NOT apply to POWER (which is non-linear in $V$ or $I$).
6. Option A is wrong. Options C, D limit it incorrectly.
_Source: Tony Kuphaldt, "Lessons in Electric Circuits — DC", Vol I, Ch 10 (Superposition)._
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