Official PYQ · 2004Set 1 · Q44BJT and MOSFET AmplifiersMCQ1 mark

GATE EC 2004 Set 1 Q44 — BJT and MOSFET Amplifiers

The neutral base width of a bipolar transistor, biased in the active region, is $0.5 \; \mu \mathrm{m}$ . The maximum electron concentration and the diffusion constant in the base are $10^{14} / \mathrm{cm}^{3}$ and $\mathrm{D}_{n}$ $=25 \mathrm{~cm}^{2} / \mathrm{sec}$ respectively. Assuming negligible recombination in the base, the collector current density is (the electron charge is $1.6 \times 10^{-19}$ coulomb)

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Answer: B

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Published 10 Oct 2026

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