alleryStart learning →A material is described as ohmic when which condition holds?
AOhm's law is valid for it
BIts resistance rises with current
CIt has no resistance at all
DIt conducts only at high voltage
Answer & Solution
Correct answer: A. Ohm's law is valid for it
1. Ohm's law is empirical and does not hold for every substance.
2. The substances for which it does hold are called ohmic.
3. For those materials the resistance stays independent of both the applied voltage and the current.
4. A resistance that changes with current is exactly what an ohmic material does not have.
_Source: OpenStax College Physics (CC BY 4.0), Ch 20 "Electric Current, Resistance, and Ohm's Law", section Resistance and Simple Circuits_
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