Two pieces of copper wire have the same length,but wire A has a square cross section of width s whereas wire B has a circular cross section of diameter s.Which of the following statements is true?
A)The resistance of both wires is the same.
B)The resistivity of both wires is the same.
C)Both the resistance and the resistivity of A and B are the same.
D)The resistance of A is greater than that of B.
E)The resistivity of A is greater than that of B.

Question

Quizplus · Accepted Answer

Resistivity is a material property independent of the shape or size of the material, so both wires, being made of copper, have the same resistivity.

Two Pieces of Copper Wire Have the Same Length,but Wire