A particular wire has a resistivity of 3.0 108m and a
Chapter 17, Problem 17.49(choose chapter or problem)
A particular wire has a resistivity of 3.0 108m and a cross-sectional area of 4.0 106 m2. A length of this wire is to be used as a resistor that will develop 48 W of power when connected across a 20-V battery. What length of wire is required?
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