A particular wire has a resistivity of 3.0 108 m and a cross-sectional area of

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A particular wire has a resistivity of 3.0 × 10–8 Ω m and a cross-sectional area of 4.0 × 10–6 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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College Physics

ISBN: 978-0495113690

7th Edition

Authors: Raymond A. Serway, Jerry S. Faughn, Chris Vuille, Charles A. Bennett

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