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30 de may. de 2024 · resistance, in electricity, property of an electric circuit or part of a circuit that transforms electric energy into heat energy in opposing electric current. Resistance involves collisions of the current-carrying charged particles with fixed particles that make up the structure of the conductors. Resistance is often considered as localized in ...
Resistivity ρ is an intrinsic property of a material and directly proportional to the total resistance R, an extrinsic quantity that depends on the length and cross-sectional area of a resistor. The resistivity of different materials varies by an enormous amount. Likewise, resistors range over many orders of magnitude.
resistance = resistivity * length / area. factor*resisitivty * factor*length / factor*area. Since the cylider's cross-sectional area increases by the square of the factor, all the factors in the equation cancel out, leaving you with 1*the original equation, i.e. the original equation. So no resistance change.
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One statement of Ohm’s law gives the relationship between current I I, voltage V V, and resistance R R in an simple circuit to be I = V R. I = V R. Resistance has units of ohms ( Ω Ω ), related to volts and amperes by 1Ω = 1V/A 1 Ω = 1 V / A. There is a voltage or IR I R drop across a resistor, caused by the current flowing through it ...
Resistivity ρ ρ is an intrinsic property of a material, independent of its shape or size. The resistance R R of a uniform cylinder of length L L, of cross-sectional area A A, and made of a material with resistivity ρ ρ, is. R = ρL A. (20.3.1) (20.3.1) R = ρ L A. The table below gives representative values of ρ ρ.
resistance翻译：抵抗;反抗;反对, 阻力, 电阻, 地下抵抗组织，秘密抵抗组织。了解更多。
