(A) The energy band gap $(E_g)$ is the energy difference between the valence band and the conduction band.For carbon (diamond), the energy band gap is

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(A) The energy band gap $(E_g)$ is the energy difference between the valence band and the conduction band.For carbon (diamond), the energy band gap is approximately $5.4 \text{ eV}$.For silicon, the energy band gap is approximately $1.1 \text{ eV}$.For germanium, the energy band gap is approximately $0.7 \text{ eV}$.Comparing these values, we find that $(E_g)_C > (E_g)_{Si} > (E_g)_{Ge}$.Therefore, the correct relationship is $(E_g)_C > (E_g)_{Si}$.

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

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Carbon, silicon, and germanium atoms have four valence electrons each. Their valence and conduction bands are separated by energy band gaps represented by $(E_g)_C$, $(E_g)_{Si}$, and $(E_g)_{Ge}$ respectively. Which one of the following relationships is true in their case?

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

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Carbon, silicon, and germanium atoms have four valence electrons each. Their valence and conduction bands are separated by energy band gaps represented by $(E_g)_C$, $(E_g)_{Si}$, and $(E_g)_{Ge}$ respectively. Which one of the following relationships is true in their case?

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If $V_0$ is the volume of a standard unit cell of germanium crystal containing $N_0$ atoms,then the expression for the mass $m$ of a volume $V$ in terms of $V_0, N_0, M$ and $N_A$ is [here,$M$ is the molar mass of germanium and $N_A$ is the Avogadro's constant].

The energy of a photon of sodium light $(\lambda = 589 nm)$ is equal to the band gap of a semiconductor material. Find the value of $E/kT$ at $300 K$.

$A$ semiconductor is cooled from $T_1 \ K$ to $T_2 \ K$. Its resistance:

When the temperature of a semiconductor is increased,its resistance and electric conductivity respectively.

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