A silicon specimen is made into a P-type semi | vedclass

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(C) The number density of silicon atoms is given as $5 	imes 10^{28} 	ext{ atoms}/m^3$.Since $1 	ext{ m}^3 = 10^6 	ext{ cm}^3$,the number density

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$1.0 	imes 10^{15} 	ext{ atoms}/cm^3$

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(C) The number density of silicon atoms is given as $5 	imes 10^{28} 	ext{ atoms}/m^3$.Since $1 	ext{ m}^3 = 10^6 	ext{ cm}^3$,the number density in $	ext{cm}^3$ is:$n_{Si} = \frac{5 	imes 10^{28}}{10^6} = 5 	imes 10^{22} 	ext{ atoms}/cm^3$.We are given that one Indium atom is doped per $5 	imes 10^7$ silicon atoms.The number of acceptor (Indium) atoms per $	ext{cm}^3$ is:$n_A = \frac{n_{Si}}{5 	imes 10^7} = \frac{5 	imes 10^{22}}{5 	imes 10^7} = 1 	imes 10^{15} 	ext{ atoms}/cm^3$.

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