Question

Two wires A and B are made of same material and have the same length but different cross-sectional areas. If the resistance of wire A is 9 times the resistance of wire B. the ratio of the radius of wire A to that of wire B is:

• A. 3:1
• B. 1:9
• C. 1:3
• D. 9:1

Answer 1

Answer:

C. 1:3

1:3