A length of wire has resistance R.The same kind of wire twice as long has resistance
A)R/2.
B)R.
C)2R.
D)none of the above

Name: A length of wire has resistance R.The same kind of wire twice as long has resistance A)R/2. B)R. C)2R. D)none of the above
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Question

Quizplus · Accepted Answer

The resistance of a wire is directly proportional to its length. Therefore, if the length of a wire is doubled, its resistance will also double. Hence, the correct choice is 2R.

A Length of Wire Has Resistance R