The resistance of the pure semiconductor decreases in a certain ratio with the?
Correct answer: C. Increase in temperature
- A. Decrease in temperature
- B. Increase in current
- C. Increase in temperature
- D. Decrease in current
Explanation
In a pure semiconductor, the resistance decreases with an increase in temperature. This happens because as temperature increases, some electrons in the valence band gain enough energy to jump to the conduction band, leaving behind holes in the valence band. This increases the number of charge carriers in the material, leading to a decrease in resistance.
Last updated
About Electrical Properties of Solids
Electrical properties of solids depend on their band structure, charge carriers and conductivity. The topic compares conductors, insulators and semiconductors, relates resistivity to temperature, and covers intrinsic and extrinsic semiconductors, donor and acceptor impurities, electron and hole conduction, and the formation of p-type and n-type materials.
Practise Physics of Solids
320 free Physics of Solids MCQs from Physics, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Exams that ask Physics questions like this
Physics is on 9 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
Related questions
Aluminium is a ........
By increasing the temperature, the conductivity of the semiconductor is:
Carbon exists as allotropes, which are different crystalline or molecular forms of the same substance. Graphite and diamond are allotropes of carbon. Diamond is a non-conductor whereas graphite is a good conductor because:
Conductivity of a semiconductor material increases byI. increasing temperature.II. increasing the surface area.III. decreasing the density of charge carriers.IV. doping with small amounts of impurities.
Dark plastic handlers often used on kitchen utensils because: