Measurement

Proportionnalité

Définition

Une relation mathématique entre deux grandeurs où leur rapport reste constant (proportionnalité directe) ou leur produit reste constant (proportionnalité inverse).

Explication

Ohm’s Law states V = IR: voltage is directly proportional to current when resistance is fixed — doubling the current doubles the voltage. Boyle’s Law (PV = constant) is an inverse proportionality: halving the volume of a gas at fixed temperature doubles its pressure. Proportionality relationships allow prediction of one variable from changes in another without solving a full equation.

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