What is the definishion of resistance?


resistance measures opposition flow of electrical current. resistance of object measured in ohms (Ω). object conductor of electricity, such copper, has low resistance level. object acts insulator, such rubber, has high resistance level. when calculating resistance of wire, there 3 factors consider: resistivity of material itself, length of wire (length directly proportional resistance), , cross-sectional area of wire (area inversely proportional resistance).



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