Question

The resistivity of a semiconductor

• A. Increases as the temperature increases
• B. Decreases as the temperature increases
• C. Remains constant even when temperature varies
• D. None of the above

Answer 1

The correct option is B Decreases as the temperature increases

In case of semiconductors as the temperature increases the electrons in the valence band get excited and jump into the conduction band and hence the conductance increases resulting in the dwindling of resistance. As resistance is directly proportional to resistivity, resistivity decreases, too