A fluid's resistance to flow is called its viscosity.
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For resistance to electrical flow, the term is specific resistance of a substance.The resistance of a fluid (gas, liquid) to flowing is called its viscosity, referred to colloquially as its thickness.
The ratio of voltage to current is called resistance. In hydraulic terms, you can equate voltage to the difference in pressure between two points, current with the resulting flow of fluid between those points , and resistance as the opposition to that flow.
It is called resistance Good conductors have a bad resistance While bad conductors or insulators have good resistance against the flow of electricity
In the simplest case, that would be resistance - but there is also another type of opposition (only relevant for AC) called reactance. The combined effect of resistance and reactance is called impedance.
resistance is the opposition to the flow of electric charge