Question:
In germanium crystal, the. forbidden energy gap in joule is :
In germanium crystal, the. forbidden energy gap in joule is :
Updated On: Jun 18, 2022
- zero
- $ 1.6\times {{10}^{-19}} $
- $ 1.1\times {{10}^{-19}} $
- $ 1.76\times {{10}^{-19}} $
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The Correct Option is C
Solution and Explanation
Semiconductors are similar to insulators but the conduction and valence bands are spaced closely,
so that at room temperature a number of electrons are found in conduction band.
For germanium, forbidden energy gap $= 0.67\, eV$
$ =6.7 \times 1.6 \times 10^{-19}J $
$ =1.072 \times 10^{-19}J $
$ =1.1 \times 10^{-19}J $
so that at room temperature a number of electrons are found in conduction band.
For germanium, forbidden energy gap $= 0.67\, eV$
$ =6.7 \times 1.6 \times 10^{-19}J $
$ =1.072 \times 10^{-19}J $
$ =1.1 \times 10^{-19}J $
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Concepts Used:
Semiconductors
Semiconductors are a crystalline solid materials, whose electrical conductivity lies between a conductor and an insulator. Semiconductors are mainly used in the manufacturing of electronic devices like capacitors, transistors, diodes, Integrated circuits, etc.
Properties of Semiconductor:
- Semiconductor acts like an insulator at Zero Kelvin. On increasing the temperature, it works as a conductor.
- Due to their exceptional electrical properties, semiconductors can be modified by doping to make semiconductor devices suitable for energy conversion, switches, and amplifiers.
- Lesser power losses.
Uses of Semiconductor:
- Semiconductors are widely used in manufacturing electronics devices like transistors, diodes, sensors, integrated circuits.
- Semiconductors are widely used in all electronic devices, like mobile phones, digital cameras, communication devices, trains, ATMs, etc.