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andreev551 [17]
3 years ago
9

A copper wire of length L and cross-sectional area A has resistance R. A second copper wire at the same temperature has a length

of 2L and a cross-sectional area of A. What is the resistance of the second copper wire?
A. 2R
B. 4R
C. R
D. 1/2 R
Physics
1 answer:
qwelly [4]3 years ago
8 0

Answer: 4R

Explanation:R=pL/A

R second wire=p2L/1/2A

=4R

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