When a voltage difference is applied to a piece of metal wire, a current of 5.0 mA flows through it. If this metal wire is now replaced with a silver wire that is twice the diameter of the original wire, how much current will flow through the silver wire? The lengths of both cables are the same, and the voltage difference remains unchanged. (The resistivity of the original metal is 1.68 × 10 ^ -8 Ω ∙ m, and the resistivity of silver is 1.59 × 10 ^ -8 Ω ∙ m.)

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Resistivity

Resistivity is a characteristic property of the conductor’s material that measures the extent to which the material opposes the flow of current. It is denoted by the Greek letter “rho”. Electrical resistivity, also known as specific resistance, depends on the nature of the material of the conductor and is unaffected by its dimensions.