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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 topic in other shifts

All Transistors questions
  1. 8 Apr 2023, Shift 2 · Q43For a given transistor amplifier circuit in CE configuration VCC=1V_{CC} = 1 V, RC=1R_C = 1 kΩ\Omega, Rb=100R_b = 100 kΩ\Omega and β=100\beta = 100.…EasySingle correctHas a figure
  2. 24 Jun 2022, Shift 1 · Q53A transistor is used in common-emitter mode in an amplifier circuit. When a signal of 10 mV is added to the base-emitter voltage, the base…EasyNumerical value
  3. 29 Jun 2022, Shift 1 · Q58A transistor is used in an amplifier circuit in common emitter mode. If the base current changes by 100 μ\muA, it brings a change of 10…EasyNumerical value
  4. 18 Mar 2021, Shift 1 · Q21An npn transistor operates as a common emitter amplifier with a power gain of 10610^6. The input circuit resistance is 100 Ω\Omega and the…MediumNumerical value
  5. 2 Apr 2017 (offline) · Q27In a common emitter amplifier circuit using an n-p-n transistor, the phase difference between the input and the output voltages will be :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 42 of the 174 JEE Main shifts held from 2017 to 2026.