JEE PHYSICS MCQ: SEMI CONDUCTOR DEVICES

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Application +4 | -1

Suppose a pure

{Si}

crystal has

5 \times 10^{28}

atoms

{m}^{-3}

. It is doped with

1 {ppm}

concentration of pentavalent Arsenic. Calculate the number of holes formed.

\left(n_i=2.5 \times 10^{16} {~m}^{-3}\right)

View answer and explanation

Correct option: B

1.25 \times 10^{10} {~m}^{-3}

Option B (

1.25 \times 10^{10} {~m}^{-3}

) is correct because it is the number of holes calculated using the mass action law in semiconductors.

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