Question on: JAMB Physics - 2024
Which of the following materials has a very large energy gap band?
A
Conductor
B
Insulator
C
Semiconductor
D
Intrinsic semiconductor
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Correct Option: B
The energy gap band refers to the energy difference between the valence band and the conduction band in a solid material.
- Insulators: Have a very large energy gap, requiring a large amount of energy to excite an electron from the valence band to the conduction band, making it difficult for electrons to move freely and conduct electricity.
- Conductors: Have a very small or no energy gap (bands overlap), allowing electrons to move freely and conduct electricity well.
- Semiconductors: Have an intermediate energy gap, with conductivity between that of conductors and insulators.
- Intrinsic semiconductors: Pure semiconductors whose conductivity depends on temperature.
Therefore, the material with the largest energy gap band is an insulator.
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