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Use the Fact That the Resistance of a Wire Carrying

Question 47

Multiple Choice

Use the fact that the resistance of a wire carrying an electrical current is directly proportional to its length and inversely proportional to its cross-sectional area. ​
If #28 copper wire (which has a diameter of 0.0126 inch) has a resistance of 68.17 ohms per thousand feet,what length of #28 copper wire will produce a resistance of 30.5 ohms?


A) About 447 ft
B) About 442 ft
C) About 432 ft
D) About 452 ft
E) About 462 ft

Correct Answer:

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