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Saturday, 31 October

JEE Main 2022 · PhysicsMultiple choiceSingle correctMediumCalculation

JEE Main 28 July 2022, Shift 2, Physics Q19

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

An n.p.n transistor with current gain β\beta = 100 in common emitter configuration is shown in figure. The output voltage of the amplifier will be

The figure, in words

Common-emitter npn transistor amplifier circuit: AC source 1 mV in series with capacitor C feeding the base, base resistor 1 k-ohm to a battery; collector resistor 10 k-ohm with battery and an output capacitor; output voltage Vout taken across the output.
  1. (1)0.1 V
  2. (2)1.0 VOfficial answer
  3. (3)10 V
  4. (4)100 V

Official answer

Option 2

NTA final key.

Chapter
Semiconductor Electronics: Materials, Devices and Simple Circuits
Topic
Transistors
Idea tested
CE Amplifier Voltage Gain

Same idea in other shifts

Asked 7× in all
  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. 13 Apr 2023, Shift 1 · Q59From the given transfer characteristic of a transistor in CE configuration, the value of power gain of this configuration is 10x10^x, for…MediumNumerical valueHas a figure
  3. 26 Jul 2022, Shift 2 · Q56The typical transfer characteristics of a transistor in CE configuration is shown in figure. A load resistor of 2 kΩk\Omega is connected…MediumNumerical valueHas a figure
  4. 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
  5. 25 Jun 2022, Shift 2 · Q60In an experiment of CECE configuration of n-p-n transistor, the transfer characteristics are observed as given in figure. If the input…MediumNumerical valueHas a figure
  6. 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

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.