Question:
For germanium crystal, the forbidden energy gap in joules is:
For germanium crystal, the forbidden energy gap in joules is:
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The forbidden energy gap for semiconductors like germanium and silicon is critical for understanding their electrical properties and behavior at different temperatures.
Updated On: Apr 22, 2026
- \( 1.216 \times 10^{-19} \) J
- \( 1.76 \times 10^{-19} \) J
- \( 1.6 \times 10^{-19} \) J
- zero
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The Correct Option is A
Solution and Explanation
Step 1: Understanding the energy gap in semiconductors.
In semiconductors, the forbidden energy gap is the energy difference between the valence band and the conduction band. For germanium, this gap is well known and can be calculated using the following relation for the energy gap \( E_g \) in terms of temperature and material properties.
Step 2: Use the known value for germanium.
The forbidden energy gap for germanium at room temperature is typically around \( 1.216 \times 10^{-19} \, \text{J} \), which corresponds to the value given in option (1).
Step 3: Conclusion.
The correct answer is \( 1.216 \times 10^{-19} \, \text{J} \), which is option (1).
In semiconductors, the forbidden energy gap is the energy difference between the valence band and the conduction band. For germanium, this gap is well known and can be calculated using the following relation for the energy gap \( E_g \) in terms of temperature and material properties.
Step 2: Use the known value for germanium.
The forbidden energy gap for germanium at room temperature is typically around \( 1.216 \times 10^{-19} \, \text{J} \), which corresponds to the value given in option (1).
Step 3: Conclusion.
The correct answer is \( 1.216 \times 10^{-19} \, \text{J} \), which is option (1).
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