Physics-Resistance & Resistivity
NEET Physics Resistance & Resistivity MCQ Question
Type: MCQ-conceptual-Medium-Class 12
Which of the following statements about resistance and resistivity is correct?
A
Metals have low resistivities compared to insulators like rubber and ceramics.
B
The resistivity of metals increases significantly with temperature.
C
Semiconductors have resistivities that increase with the addition of impurities.
D
The resistivity of a material is constant regardless of temperature changes.
Correct Answer
Option A
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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