Question:
If the length of a uniform metallic wire is halved and its radius is doubled, its resistivity is
If the length of a uniform metallic wire is halved and its radius is doubled, its resistivity is
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Do not confuse resistance with resistivity.
\[
R=\rho\frac{L}{A}
\]
Changing length and area changes \(R\), not \(\rho\).
Updated On: Apr 27, 2026
- halved
- unchanged
- doubled
- tripled
- quadrupled
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The Correct Option is B
Solution and Explanation
Resistivity is a property of the material itself.
It depends on:
Hence, the correct answer is: \[ \boxed{(B)\ \text{unchanged}} \]
- nature of the material,
- temperature.
- length of the wire,
- radius of the wire.
Hence, the correct answer is: \[ \boxed{(B)\ \text{unchanged}} \]
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