# Questions tagged [linear-systems]

A linear system is a mathematical model of a system based on the use of a linear operator. A system is linear if and only if it satisfies the superposition principle, or equivalently both the additivity and homogeneity properties, without restrictions.

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### Why we use vector sum to calculate net potential in AC circuits?

My physics professor used vector sum to find net voltage at any instant in the following $RL$ circuit and said that it is equal to vector sum of phasor vector of potential drop across Resistor and ...
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### Superposition principle in electrostatics: Experiments

I understand that the superposition principle in electrostatics is consistent with experience and therefore is not very questionable. However, is it possible to perform a direct experimental test of ...
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### What do we mean by linear Simple Harmonic Motion?

I am confused by the use of "linear" in SHM. What does linear actually signify in Linear SHM. Does it mean :- That the displacement is linear? (I suppose it isn't since displacement varies ...
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