Resistance
Definition
Resistance is a measure of how much a material or device opposes the flow of electric current. It is determined by the material's properties and geometry, and it is measured in ohms.
Related terms
Ohmic Device: An ohmic device is one that follows Ohm's Law, meaning its resistance remains constant regardless of the applied voltage.
Non-Ohmic Device: A non-ohmic device does not follow Ohm's Law and its resistance changes with the applied voltage.
Conductivity: Conductivity refers to how easily a material allows electric current to pass through it. It is the reciprocal of resistance and is measured in siemens per meter (S/m).
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