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प्रश्न
How many extra free electrons does the addition of \[0.001\%\] arsenic donate in \[1\ \mathrm{cm^3}\] of germanium?
विकल्प
\[10^{22}\] extra free electrons
\[10^{17}\] extra free electrons
\[10^{4}\] extra free electrons
\[2.5\times10^{13}\] extra free electrons
MCQ
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उत्तर
Adding \[0.001\%\] arsenic donates \[10^{17}\] extra free electrons in the same volume. This greatly increases the free-electron count compared with pure germanium.
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