SATHEE: Electronic Devices Question 212

Electronic Devices Question 212

Question: A silicon speciman is made into a P-type semi-conductor by dopping, on an average, one Indium atom per $5 \times 10^{7}$ silicon atoms. If the number density of atoms in the silicon specimen is $5 \times 10^{28} atoms / m^{3}$ then the number of acceptor atoms in silicon per cubic centimetre will be

[MP PMT 1993, 2003]

Options:

A) $2.5 \times 10^{30} a t o m s / c m^{3}$

B) $1.0 \times 10^{13} a t o m s / c m^{3}$

C) $1.0 \times 10^{15} a t o m s / c m^{3}$

D) $2.5 \times 10^{36} a t o m s / c m^{3}$

Show Answer

Answer:

Correct Answer: C

Solution:

Number density of atoms in silicon specimen = $5 x 10^{2} 8 a t o m / m^{3}$ = $5 x 1022 a t o m / c m^{3}$ Since one atom of indium is doped in 5 x 107 Si atom.

So number of indium atoms doped per cm3 of silicon.

$n = \frac{5 \times 10^{22}}{5 \times 10^{7}} = 1 \times 10^{15} a t o m / c m^{3} .$

Electronic Devices Question 212

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Electronic Devices Question 212

Question: A silicon speciman is made into a P-type semi-conductor by dopping, on an average, one Indium atom per 5×107 silicon atoms. If the number density of atoms in the silicon specimen is 5×1028atoms/m3 then the number of acceptor atoms in silicon per cubic centimetre will be

Options:

Answer:

Solution:

Engineering Preparation

Medical Preparation

NCERT Books & Solutions

Important Resources

Other Resources

Syllabus

Test Platform

Sample Mock Test

Mentorship

NCERT Exercise Video Solution

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