A certain wire has a resistance \[R\]. The resistance of another wire – McqOptions

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1.	A certain wire has a resistance \[R\]. The resistance of another wire identical with the first except having twice its diameter is [CPMT 1999]
A.	\[2\,R\]
B.	\[0.25\,R\]
C.	\[4\,R\]
D.	\[0.5\,R\]
Answer» C. \[4\,R\]

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