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A wire of length L and radius r has a resistance R. What is the resistance of a second wire made from the same material that has a length L/2 and a radius r/2? A) 4R B) 2R C) R D) R/4
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A wire of length L and radius r has a resistance R. What is the resistance of a second wire made from the same material that has a length L/2 and a radius r/2?

A) 4R
B) 2R
C) R
D) R/4

User LuVa
by
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1 Answer

4 votes
I think it’s B or 2R
User Billy Coover
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