A particular wire has a resistivity of 35 10-8 middotm and


A particular wire has a resistivity of 3.5 ? 10-8 ·m and a cross-sectional area of 3.9 ? 10-6 m2. A length of this wire is to be used as a resistor that will develop 49 W of power when connected across a 20 V battery. What length of wire is required?

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Physics: A particular wire has a resistivity of 35 10-8 middotm and
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