Questions
The electrical conductivity of a semi conductor increases when electromagnetic radiation of wavelength shorter than 1240 nm is incident on it. The forbidden band energy for the semi conductor is (in eV)
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Correct option is B
E=hcλ=1200012400A0evSimilar Questions
An n-type semiconductor has impurity level 20meV below the conduction band. In a thermal collision, transferable energy is KT. The value of T for which electrons start to jump in conduction band is :
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