1. Compute the resistance of a hardened copper rod 2 meters long and 8 mm in diameter if the resistivity of the material is 1.756 x 10-8 ohm-meters.

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1. Compute the resistance of a hardened copper rod 2 meters long and 8 mm in
diameter if the resistivity of the material is 1.756 x 10-8 ohm-meters.
2. A0.500-meter length of wire with a cross-sectional area of 3.14 x 10-6 meters
squared is found to have a resistance of 2.53 x 10-3 ohms. According to the
resistivity chart, from what material is the wire made?
3. The resistance of a uniform copper wire 50.0 meters long and 1.15 mm in
diameter is 0.830 ohms at 20° C. What is the resistivity of the copper at this
temperature?
4. A 200 m long aluminum wire has the same resistance and cross-sectional
area as a carbon wire. What is the length of the carbon wire?
Transcribed Image Text:1. Compute the resistance of a hardened copper rod 2 meters long and 8 mm in diameter if the resistivity of the material is 1.756 x 10-8 ohm-meters. 2. A0.500-meter length of wire with a cross-sectional area of 3.14 x 10-6 meters squared is found to have a resistance of 2.53 x 10-3 ohms. According to the resistivity chart, from what material is the wire made? 3. The resistance of a uniform copper wire 50.0 meters long and 1.15 mm in diameter is 0.830 ohms at 20° C. What is the resistivity of the copper at this temperature? 4. A 200 m long aluminum wire has the same resistance and cross-sectional area as a carbon wire. What is the length of the carbon wire?
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