GATE EC 2025 Set 1 — Question 47
Go beyond PYQs with Success TrackerAI-powered personalised practice and doubt support. Unlimited practice on eligible plans; AI usage limits apply.MCQ+2 / -0.67MediumBiasing & DC Operating PointBJT & MOSFET AmplifiersAnalog CircuitsZener Diode ApplicationsP-N Junction & DiodesElectronic Devices
Analog Circuits → BJT & MOSFET Amplifiers → Biasing & DC Operating Point
Last updated
Question
In the circuit shown, the identical transistors and are biased in the active region with . The Zener diode is in the breakdown region with and .If and , then the values of and (in k, rounded off to one decimal place) are ______, respectively.
Correct answer
(A) 0.6 and 0.4
Solution
From the figure: is diode-connected (base tied to collector) with its emitter at 20 V; the Zener sits below it; the node under the Zener drives the base of and goes to ground through . 's emitter connects to 20 V through , and its collector feeds .
1.Node voltages: V, so the base of is at V and the emitter of at V.
2.Currents of : mA, mA, mA.
3. carries the Zener current plus the base current of (which flows out of the base into the node):
4. carries :
Answer: (A) 0.6 and 0.4Continue learning with Success Tracker
A step still unclear? Work through it with support
Use Success Tracker to ask about the reasoning, then try another GATE EC question to check your understanding.
AI-powered practice· Unlimited practice on eligible plans
- PYQs with solutions
- Attempt available previous-year questions, then compare your reasoning with the worked solution. Coverage varies by stream.
- Practice that adapts
- Choose a topic, work on weaker areas and bookmark questions to revisit. Your attempts feed your progress tracking.
- AI doubt support
- Ask follow-up questions about a step or concept while practising, instead of stopping at the final answer.
Unlimited practice is available on eligible plans. Free practice and AI usage have limits; check the current plan allowances before choosing.
This page stays readable without an account. AI responses can be wrong; check them against the solution and source material.
More questions on BJT & MOSFET Amplifiers
2026 Set 1 Q14Consider carrier transport in a Zener diode in the breakdown region. Which is the dominant…2026 Set 1 Q17The ideal OP-AMP circuit shown in the Figure produces output voltage when the Switch, S,…2026 Set 1 Q18Consider the circuit shown in the Figure with and . Assume…2026 Set 1 Q25Consider a p-n junction diode when it is forward biased with 2 V. Which of the following is/are the…2026 Set 1 Q29Figure shows the output characteristics of two different Bipolar Junction Transistors (BJT), BJT 1…