If a wire is stretched to quadruple its length without changing its area, what will happen
to its resistivity?
-
A.
It halves.
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B.
It quadruples.
-
C.
It remains the same.
-
D.
It doubles.
Correct Answer:
C. It remains the same.
Explanation:
Resistivity is an intrinsic property of a material and does not depend on its physical dimensions like length or cross-sectional area. While stretching a wire changes its resistance, the resistivity remains constant as long as the material and temperature stay the same. Therefore, the resistivity remains unchanged.
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