In an intrinsic semiconductor, the density of conduction electrons is \( 7.07 \times 10^{15} \ma....

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In an intrinsic semiconductor, the density of
\( \mathrm{P} \)
conduction electrons is \( 7.07 \times 10^{15} \mathrm{~m}^{-3} \). When it is
W
doped with indium, the density of holes becomes \( 5 \times 10^{22} \mathrm{~m}^{-3} \). Find the density of conduction electrons in doped semiconductor
(1) Zero
(2) \( 1 \times 10^{9} \mathrm{~m}^{-3} \)
(3) \( 7 \times 10^{15} \mathrm{~m}^{-3} \)
(4) \( 5 \times 10^{22} \mathrm{~m}^{-3} \)


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