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Friday, 9 October

JEE Main 2020 · PhysicsMultiple choiceSingle correctMediumMulti-step

JEE Main 9 January 2020, Shift 2, Physics Q20

Question 20 of 75 in this shift, Physics question 20 of 25, Section A.

The current ii in the network is :

The figure, in words

Bridge network: battery 9 V in series with a 5 ohm resistor on the bottom branch; current i marked upward on the left. Top-left arm 5 ohm in series with a diode D, top-right arm 10 ohm, left-lower arm 10 ohm, right-lower arm 20 ohm in series with a second diode D, and a 5 ohm resistor across the middle (vertical) diagonal.
  1. (1)0.6 A
  2. (2)0.3 AOfficial answer
  3. (3)0.2 A
  4. (4)0 A

Official answer

Option 2

NTA final key (Jan 2020).

Chapter
Semiconductor Electronics: Materials, Devices and Simple Circuits
Topic
Semiconductor Diodes
Idea tested
Ideal vs. Practical Diode Circuit Analysis

Same idea in other shifts

Asked 3× in all
  1. 4 Apr 2026, Shift 1 · Q42Consider a circuit consisting of a capacitor (20 μ20\ \muF), resistor (100 Ω100\ \Omega) and two identical diodes as shown in figure. The…MediumDiagram basedHas a figure
  2. 8 Apr 2025, Shift 2 · Q45The output voltage in the following circuit is (Consider ideal diode case)MediumDiagram basedHas a figure

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.