Semiconducting Devices Question 254
Question: A solid reflects incident light and it’s electrical conductivity decreases with temperature. The binding in this solids
Options:
A) Ionic
B) Covalent
C) Metallic
D) Molecular
Show Answer
Answer:
Correct Answer: C
Solution:
Metals reflects incident light by the vibrations of free electrons under the influence of electric field of incident wave.
The conductivity of metals decreases with increase of temperature due to increase in random motion of free electrons.
The bonding is therefore metallic.
