NEET Physics Resistance & Resistivity MCQ Question
Which of the following statements about resistance and resistivity is correct?
Metals have low resistivities compared to insulators like rubber and ceramics.
The resistivity of metals increases significantly with temperature.
Semiconductors have resistivities that increase with the addition of impurities.
The resistivity of a material is constant regardless of temperature changes.
Correct Answer
Detailed Explanation
Metals possess low resistivities in the range of 10^-8 to 10^-6 Wm, while insulators can have resistivities that are 10^18 times greater. The resistivity of metals typically increases with temperature, not the other way around.
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