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The energy band diagrams for three semiconductor samples of silicon are as shown. We can then assert thatImage
  • ASample $X$ is undoped while samples $Y$ and $Z$ have been doped with a third group and a fifth group impurity respectively
  • BSample $X$ is undoped while both samples $Y$ and $Z$ have been doped with a fifth group impurity
  • CSample $X$ has been doped with equal amounts of third and fifth group impurities while samples $Y$ and $Z$ are undoped
  • DSample $X$ is undoped while samples $Y$ and $Z$ have been doped with a fifth group and a third group impurity respectively
[Haryana CEE 1996]
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