Engineering Board Exam Reviewer · Voltage, Current and Resistance · medium
Find the resistance of a copper wire 100 m long with a cross-sectional area of 2 mm2 (resistivity of copper =1.72×10-8, · m).
- 1.72,
- 0.43,
- 0.86,
- 860,
Answer
C. 0.86,
Solution
R= /A=(1.72×10-8) 1002×10-6=0.86, .
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