Official PYQ · 2005Set 1 · Q53BJT and MOSFET AmplifiersMCQ1 mark

GATE EC 2005 Set 1 Q53 — BJT and MOSFET Amplifiers

The transistors used in a portion of the TTL gate shown in the figure have a $\beta=100$ . The base-emitter voltage of is $0.7 \mathrm{~V}$ for a transistor in active region and $0.75 \mathrm{~V}$ for a transistor in saturation. If the sink current $I=1 \mathrm{~mA}$ and the output is at logic $0,$ then the current $I_{R}$ will be equal to

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Answer: C

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Published 10 Oct 2026

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GATE EC 2005 Set 1 Q53 — BJT and MOSFET Amplifiers

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