Copper has a resistivity of ρc = 1.72 × 10-8 Ω⋅m. An extension cord made of copper is connected to a DC electric motor which requires a current of at least Imin = 4.5 A in order to operate. The cord is connected to a V = 151 V source. A. Input an expression for the maximum ratio of length to cross-sectional area, γ, the cord can have if the motor is to operate. B. What is the ratio numerically in 1/m? C. Experimentally, it is found that the maximum length the cord can be is Lmax = 30 m. What is the wire's minimum diameter, Dmin, in meters?
Copper has a resistivity of ρc = 1.72 × 10-8 Ω⋅m. An extension cord made of copper is connected to a DC electric motor which requires a current of at least Imin = 4.5 A in order to operate. The cord is connected to a V = 151 V source. A. Input an expression for the maximum ratio of length to cross-sectional area, γ, the cord can have if the motor is to operate. B. What is the ratio numerically in 1/m? C. Experimentally, it is found that the maximum length the cord can be is Lmax = 30 m. What is the wire's minimum diameter, Dmin, in meters?
College Physics
11th Edition
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Raymond A. Serway, Chris Vuille
Chapter1: Units, Trigonometry. And Vectors
Section: Chapter Questions
Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...
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Copper has a resistivity of ρc = 1.72 × 10-8 Ω⋅m. An extension cord made of copper is connected to a DC electric motor which requires a current of at least Imin = 4.5 A in order to operate. The cord is connected to a V = 151 V source.
A. Input an expression for the maximum ratio of length to cross-sectional area, γ, the cord can have if the motor is to operate.
B. What is the ratio numerically in 1/m?
C. Experimentally, it is found that the maximum length the cord can be is Lmax = 30 m. What is the wire's minimum diameter, Dmin, in meters?
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