NEET UG PHYSICS MCQ: SEMI CONDUCTOR DEVICES

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An electron-hole pair is formed when light of maximum wavelength 6000

\mathop A\limits^ \circ

is incident on the semiconductor. What is the band gap energy of the semiconductor?

(

h = 6.62\; \times {10^{ - 34}}

J-s)

View answer and explanation

Correct option: A

3.31

\times {10^{ - 19}}

Option A (3.31

\times {10^{ - 19}}

J) is correct because it is calculated using the formula

E = \frac{{hc}}{\lambda}

with the given wavelength.

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I = A{T^2}{e^{q/{V_L}}}

{V_L}

\sqrt{n}.

n

p - n\;

{10^{17}}\mathrm{c}{\mathrm{m}^{ - 3}}

P

{10^{16}}

\mathrm{c}{\mathrm{m}^{ - 3}}

N

kT =

{n_i} = 1.4 \times {10^{10}}

\mathrm{c}{\mathrm{m}^{ - 3}}