(A) The bandgap energy $(E_g)$ for Carbon (diamond) is approximately $5.5 \ eV$.The bandgap energy $(E_g)$ for Silicon is approximately $1.1 \ eV$.The

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(A) The bandgap energy $(E_g)$ for Carbon (diamond) is approximately $5.5 \ eV$.The bandgap energy $(E_g)$ for Silicon is approximately $1.1 \ eV$.The bandgap energy $(E_g)$ for Germanium is approximately $0.7 \ eV$.Comparing these values,we find that $(E_g)_C > (E_g)_{Si} > (E_g)_{Ge}$.Therefore,the correct relation is $(E_g)_C > (E_g)_{Si}$.

Class 12 Physics Semiconductor Electronics Classification of Materials and Energy Band Theory

Medium

Carbon,Silicon,and Germanium atoms each have four valence electrons. If their bandgaps are represented by $(E_g)_C$,$(E_g)_{Si}$,and $(E_g)_{Ge}$ respectively,which of the following relations is correct?

A
$(E_g)_C > (E_g)_{Si}$
B
$(E_g)_C < (E_g)_{Si}$
C
$(E_g)_C = (E_g)_{Si}$
D
$(E_g)_C < (E_g)_{Ge}$

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Semiconductor Electronics

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Classification of Materials and Energy Band Theory

Assertion : The resistivity of a semiconductor increases with temperature.
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For a crystal system where $a = b = c$ and $\alpha = \beta = \gamma \neq 90^\circ$,the system is:

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$\sigma_1$ and $\sigma_2$ are the electrical conductivities of $Ge$ and $Na$ respectively. If these substances are heated,then

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Carbon,Silicon,and Germanium atoms each have four valence electrons. If their bandgaps are represented by $(E_g)_C$,$(E_g)_{Si}$,and $(E_g)_{Ge}$ respectively,which of the following relations is correct?

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Assertion : The resistivity of a semiconductor increases with temperature.Reason : The atoms of a semiconductor vibrate with larger amplitude at higher temperatures,thereby increasing its resistivity.

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In semiconductors at room temperature,which of the following statements is correct regarding their energy bands?

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Assertion : The resistivity of a semiconductor increases with temperature.
Reason : The atoms of a semiconductor vibrate with larger amplitude at higher temperatures,thereby increasing its resistivity.