NEET UG 2017 · Physics · Question 21
NEET 2017 Physics, question 21
Question 21 of the NEET 2017 paper (code A) is a Physics question from Semiconductor Electronics: Materials, Devices and Simple Circuits. Its idea, Bipolar Junction Transistor, was asked 3 times, in 2017, 2018 and 2020, across NEET 2017–2026. The CBSE official answer key gives option 3.
Updated 2026-10-08
Q21 · Physics
In a common emitter transistor amplifier the audio signal voltage across the collector is 3 V. The resistance of collector is 3 k. If current gain is 100 and the base resistance is 2 k, the voltage and power gain of the amplifier is :
- 1200 and 1000
- 215 and 200
- 3150 and 15000Official answer
- 420 and 2000
Official answer: option 3 · CBSE official answer key
Same idea
Bipolar Junction Transistor, in other papers
NEET asked this idea 3 times, in 2017, 2018 and 2020. The other 2 questions below.
- 2020 Q156For transistor action, which of the following statements is correct ?One-line MCQ · Easy
- 2018 Q15In the circuit shown in the figure, the input voltage is 20 V, and . The values of , and …Figure-based · Medium
Bipolar Junction Transistor: every question and how it was framed
The chapter
Semiconductor Electronics: Materials, Devices and Simple Circuits in ten years of NEET
27 questions from 2017–2026, asked in 10 of 10 papers, about 2.6 a paper. Semiconductor Devices alone had 17.