Mathematics · Electricity & Calculations
The resistance of a copper wire 200 m long is 21 Ω. If its thickness (diameter) is 0.44 mm, its specific resistance (resistivity) is around:
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 11.6 × 10-8 Ω-m✓
- 21.2 × 10-8 Ω-m
- 31.4 × 10-8 Ω-m
- 41.8 × 10-8 Ω-m
Correct answer
1.6 × 10-8 Ω-m
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