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Saturday, 31 October

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JEE Main 6 September 2020, Shift 2, Physics Q25

Question 25 of 75 in this shift, Physics question 25 of 25.

The output characteristics of a transistor is shown in the figure. When VCEV_{CE} is 10 V and IC=4.0I_C = 4.0 mA, then value of βac\beta_{ac} is ________.

The figure, in words

Graph of output characteristics: I_C in mA (ticks 2, 4, 6, 8) on y-axis vs V_CE in volts (ticks 2, 4, 6, 8, 10, 12, 14) on x-axis; family of curves for I_B = 10, 20, 30, 40, 50, 60 microamp, each rising then flattening (saturating) beyond about V_CE = 4 V

Official answer

150.00

NTA final key (Sep 2020).

Chapter
Semiconductor Electronics: Materials, Devices and Simple Circuits
Topic
Transistors
Idea tested
AC vs DC Current Gain

Same idea in other shifts

Asked 2× in all
  1. 27 Jul 2022, Shift 2 · Q49For a constant collector-emitter voltage of 8 V, the collector current of a transistor reached to the value of 6 mA from 4 mA, whereas…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. This question needs a figure we do not reproduce; it is described in words above. Lumi analyses 108 of the 174 JEE Main shifts held from 2017 to 2026.