1. What length of copper (p=1.78 x 10-80m) wire 1.2 mm in diameter is needed to make a 20-Q resistor at 20°C? What length of nichrome wire is needed? (p = 100 x 10-8Qm)
1. What length of copper (p=1.78 x 10-80m) wire 1.2 mm in diameter is needed to make a 20-Q resistor at 20°C? What length of nichrome wire is needed? (p = 100 x 10-8Qm)
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Transcribed Image Text:1. What length of copper (p=1.78 x 10-8Qm)
wire 1.2 mm in diameter is needed to make
a 20-Q resistor at 20°C? What length of
nichrome wire is needed? (p = 100 x
10-8Qm)
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