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The resistance of a copper wire 200 m long is 21 ω. If its thickness (diameter) is 0.44 mm, its specific resistance is around | |
A. | 1.2 x 10-8 ω-m [Wrong Answer] |
B. | 1.4 x 10-8 ω-m [Wrong Answer] |
C. | 1.6 x 10-8 ω-m [Correct Answer] |
D. | 1.8 x 10-8 ω-m [Wrong Answer] |