General Science • PhysicsMedium
What happens to the electrical resistance of a pure semiconductor when its temperature increases?
A. It increases uniformly
B. It decreases✓ Correct Answer
C. It remains completely constant
D. It first decreases and then becomes infinite
💡 Solution & Explanation
The electrical resistance of a pure semiconductor decreases as its temperature increases because thermal energy excites more electrons from the valence band to the conduction band, increasing charge carriers. This behavior is contrary to that of metallic conductors, whose resistance increases with temperature.
More General Science Physics questions
- What is the work done by the centripetal force on a body moving along a uniform circular path?
- What happens to the focal length of a convex lens when it is completely immersed in water?
- Which conservation law is fundamentally the basis for Kirchhoff's current law (KCL) in electrical circuits?
- Which of the following quantities remains unchanged when a sound wave travels from one medium to another?
- What is the minimum distance required between a source of sound and an obstacle to hear a distinct echo under…