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Saturday, 31 October

JEE Main 2024 · PhysicsMultiple choiceDiagram basedEasyDiagram reading

JEE Main 4 April 2024, Shift 2, Physics Q31

Question 31 of 90 in this shift, Physics question 1 of 30, Section A.

Which of the diode circuit shows correct biasing used for the measurement of dynamic resistance of p-n junction diode :

The figure, in words

Four circuit diagrams, each a battery with a resistor R and a diode (D1, D2, D3, D4) in series with a ground connection; the options are these circuits (diode orientation differs between them).
  1. (1)[figure: 5V battery in series with resistor RR and diode D1D_1, other end grounded]
  2. (2)[figure: 5V battery in series with resistor RR and diode D2D_2, other end grounded]Official answer
  3. (3)[figure: battery in series with diode D3D_3 and resistor RR, other end grounded]
  4. (4)[figure: battery in a loop with diode D4D_4 and resistor RR, ground connection at the right]

Official answer

Option 2

NTA final key.

Chapter
Semiconductor Electronics: Materials, Devices and Simple Circuits
Topic
Semiconductor Diodes
Idea tested
Forward and Reverse Biasing

Same idea in other shifts

Asked 6× in all
  1. 4 Apr 2026, Shift 2 · Q45Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R Assertion A: A diode under…MediumAssertion–reason
  2. 27 Jan 2024, Shift 1 · Q48Which of the following circuits is reverse - biased ?EasyDiagram basedHas a figure
  3. 6 Apr 2023, Shift 2 · Q42Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R Assertion A: Diffusion current in a…MediumAssertion–reason
  4. 10 Apr 2023, Shift 2 · Q43If each diode has a forward bias resistance of 25 Ω\Omega in the below circuit, which of the following options is correct:MediumDiagram basedHas a figure
  5. 28 Jun 2022, Shift 1 · Q47For using a multimeter to identify diode from electrical components, choose the correct statement out of the following about the diode :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.