If the resistance of wire A is four times resistance of wire B then the ratio of cross sectional areas of wires is
A. 1:2
B. 1:4
C. 1:8
D. 1:6
Answer:B
If the resistance of wire A is four times resistance of wire B then the ratio of cross sectional areas of wires is
A. 1:2 B. 1:4 C. 1:8 D. 1:6