JEE Main 2023 · PhysicsMultiple choiceSingle correctEasyCalculation

JEE Main 12 April 2023, Shift 1, Physics Q49

Question 49 of 90 in this shift, Physics question 19 of 30, Section A.

In an n-p-n common emitter (CE) transistor the collector current changes from 5 mA to 16 mA for the change in base current from 100

\mu

A and 200

\mu

A, respectively. The current gain of transistor is ________.

(1)0.9
(2)9
(3)110Official answer
(4)210

Official answer

Option 3

NTA final key.

Chapter: Semiconductor Electronics: Materials, Devices and Simple Circuits
Topic: Transistors
Idea tested: Current Gains Alpha and Beta

Same idea in other shifts

Asked 4× in all

27 Aug 2021, Shift 2 · Q17For a transistor $\alpha$ and $\beta$ are given as $\alpha=\frac{I_C}{I_E}$ and $\beta=\frac{I_C}{I_B}$ . Then the correct relation between…EasySingle correct
24 Feb 2021, Shift 1 · Q16If an emitter current is changed by 4 mA, the collector current changes by 3.5 mA. The value of $\beta$ will be :EasySingle correct
18 Mar 2021, Shift 2 · Q15The correct relation between $\alpha$ (ratio of collector current to emitter current) and $\beta$ (ratio of collector current to base…EasySingle correct

Question text from the official JEE Main paper published by NTA; answer from the final answer key. Chapter, topic and idea tags, difficulty and skill are Lumi’s. Lumi analyses 108 of the 174 JEE Main shifts held from 2017 to 2026.