Question

If the lenght of wire A is four times the lenght of wire B, provided the volume is same ,
find the ratio of their resistances.

Answer 1

Answer:

answer is : 256:1

Explanation:

resistance is directly proptional to length

and inversely proptional to area

given

volume are same

length of B is x

so for A is 4x.

4/3π(4x)^3=4/3π(x)^3

v1/v2=1/64

R1/R2=4x×64/(x×1)

=256:1

hope got it mark it as branliest answer

Here we multiplied area with length which gives volume

and equated volume instead of area.