Distinguish, differentiate, compare and explain what is the differences between Conductors and Semiconductors.
Comparison and Differences between Conductors and Semiconductors
- In conductors, electric conduction is possible in them. In semiconductors, at low temperature, there is no electric conduction in them, but at high-temperature, electric conduction becomes possible in them.
- Conductors have a very large number of current carriers free electrons. Semiconductors have neither a very large number nor a very small number of current carriers free electrons.
- The resistance of conductors increases with increase in temperature, i.e., their temperature coefficient of resistance is positive. The resistance of semiconductors decreases with increase in temperature, i.e., the temperature coefficient of resistance is negative.
- On adding impurities, the conductivity in conductors decreases. On adding impurities, the conductivity in semiconductors increases.
- The first one has a very small resistivity. The second one has resistivity nearly 0.1-ohm meter which is very high as compared with the first one.
- In conductors, the forbidden energy gap between the conduction band and valence band is nearly zero. In semiconductors, the forbidden energy gap between the conduction band and valence band is nearly 1 eV.
- Examples of Conductor : Metals, a Human Body, Earth etc.
- Examples of Semiconductor : Silicon, Germanium etc.