the resistance R of a wire varies direvtly as its length L and inversely as the square of its diameter d.  a) write an equation that expressesthis joint variation. (use k for the constant of proportionality.) _________ b)if the diameter is doubles and the length is tripled, by what factor is the resistance changed?

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Temperature Variance of Resistance

Electrical resistance or simply resistance is the property of a material that opposes the free flow of electrons through it. The total amount of resistance to the flow of charges (or current) is affected by many factors like the length of the conducting material, its cross-sectional area, resistivity, and temperature.