NEET Physics Resistance & Resistivity MCQ Question
Which of the following combinations about resistance and resistivity is correct?
Metals have low resistivities, and their resistivity increases with temperature.
Insulators have very high resistivities, and their resistivity decreases with temperature.
Semiconductors have resistivities that decrease with temperature and can be modified by impurities.
All materials have the same temperature dependence of resistivity regardless of their type.
Correct Answer
Detailed Explanation
Semiconductors are characterized by a decrease in resistivity with an increase in temperature, and their properties can be altered by adding impurities. This aligns with the information about semiconductors in the NCERT context.
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