Question

There are two wires of the same length and of the same material with radius r and 2r respectively. The ratio of their specific resistance is

• A. 1:2
• B. 1:1
• C. 1:4
• D. 4:1

Answer 1

Answer: (B)

1:1

The resistivity or specific resistance of a material is an intensive property and it is defined as a resistance offered by a unit length and unit cross section area of that material when a fixed voltage is applied across it. so the specific resistance only depends upon temperature and material not on physical properties like size and shape.

Hence B is correct option.