MHT CET · Physics · Semiconductors
A donor impurity results in
- A conduction band just above the filled valence band.
- B holes as majority carriers and electrons as minority carriers.
- C production of \(\mathrm{n}\) -type semiconductor.
- D production of \(\mathrm{p}\) -type semiconductor.
Answer & Solution
Correct Answer
(C) production of \(\mathrm{n}\) -type semiconductor.
Step-by-step Solution
Detailed explanation
\( \begin{array}{l} \beta=50 \\ \mathrm{R}_{1}=1 \mathrm{k} \Omega=10^{3} \Omega \\ \mathrm{V}_{\mathrm{i}}=0.01 \mathrm{~V} \\ \mathrm{I}_{\mathrm{e}}=? \\ \beta=\frac{\mathrm{I}_{\mathrm{C}}}{\mathrm{I}_{\mathrm{B}}}=50 ; \quad \mathrm{I}_{\mathrm{C}}=50 \times \mathrm{I}_{\mathrm{B}} \\ \mathrm{V}_{\mathrm{i}}=\mathrm{I}_{\mathrm{B}} \times \mathrm{R}_{\mathrm{i}} \\ \mathrm{I}_{\mathrm{B}}=\frac{\mathrm{V}_{\mathrm{i}}}{\mathrm{R}_{\mathrm{i}}}=\frac{0.01}{10^{3}}=10^{-5} \\ \therefore \mathrm{I}_{\mathrm{C}}=50 \times 10^{-5}=500 \times 10^{-6} \mathrm{~A} \end{array} \)
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