Two conductors are made of the same material and have the same length. Conductor A is a solid wire of diameter 1.0 mm. Conductor B is a hollow tube of outside diameter 2.0 mm and inside diameter 1.0 mm. The resistance ratio R A /R B will be
Text Solution
Verified by ExpertsThe correct answer is:
C
Resistance of wire, 
Similarly, for hollow conductor B
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