A Nichrome wire has a radius of 0.50 mm and a resistivity of 1.5 × 10−⁶ Ω⋅m.If the wire carries a current of 1.0 A,what is the potential difference per unit length along this wire?

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Quizplus · Accepted Answer

The potential difference per unit length is given by:$$V/l = Iρ/A$$where:* V is the potential difference* l is the length of the wire* I is the current* ρ is the resistivity* A is the cross-sectional area of the wireSubstituting the given values into the equation, we get:$$V/l = (1.0 A)(1.5 × 10^{-6} Ω⋅m)/π(0.50 × 10^{-3} m)^2 = 1.9 V/m$$Therefore, the potential difference per unit length along the wire is 1.9 V/m.

A Nichrome Wire Has a Radius of 0