27. Resistors & DC Circuits
Resistors and Ohm's Law
3:42 minutes
Problem 27
Textbook Question
Textbook QuestionA 2.0-mm-diameter wire formed from a composite material has a resistivity that decreases with distance along the wire as ρ=ρ₀e^−αˣ, where ρ₀=4.0×10^−5 Ω m , x (in m) is measured from one end of the wire, and the constant α=4.0 m^−1. What is the resistance of a 50-cm-long length of this wire?
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