NEET Physics Resistance & Resistivity MCQ Question
Which of the following statements about resistance and resistivity is correct?
Resistance increases with temperature for all materials.
The resistivity of metals generally decreases with an increase in temperature.
Insulators have significantly higher resistivities compared to metals.
Semiconductors have constant resistivity regardless of temperature changes.
Correct Answer
Detailed Explanation
Insulators like ceramics and rubber have resistivities that are many orders of magnitude greater than those of metals, which typically have low resistivities. Metals show an increase in resistivity with temperature, while semiconductors exhibit a decrease in resistivity with temperature rise.
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