Question
Question: Two copper wires of length l and 2l have radii, r and 2r respectively. What is the ratio of their sp...
Two copper wires of length l and 2l have radii, r and 2r respectively. What is the ratio of their specific resistances?
A
1 : 2
B
2 : 1
C
1 : 1
D
1 : 3
Answer
1 : 1
Explanation
Solution
: The specific resistance is independent of the dimensions of the wire but depends upon the nature of the material of the wire.