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Saturday, 31 October

JEE Main 2020 · PhysicsMultiple choiceDiagram basedMediumData or graph

JEE Main 4 September 2020, Shift 1, Physics Q19

Question 19 of 75 in this shift, Physics question 19 of 25.

Take the breakdown voltage of the zener diode used in the given circuit as 6V. For the input voltage shown in figure below, the time variation of the output voltage is : (Graphs drawn are schematic and not to scale)

The figure, in words

A sine wave of V against time, starting at V=0, with peak labelled 10 V and trough labelled −-10 V (two cycles drawn). Circuit: a resistor R1_1 in the top line, input Vin_{in} on the left; across the output (right) two diodes in opposite directions connected in series in a vertical branch between the top and bottom lines (zener-diode symbols), with output Vo_o marked and open circle terminals at the right ends of the top and bottom lines. Options are graphs with vertical axis V and horizontal axis t, two cycles each.
  1. (1)[figure: graph of V vs t, full sine wave]
  2. (2)[figure: graph of V vs t, both positive and negative half-cycles flattened at the peaks]Official answer
  3. (3)[figure: graph of V vs t, positive half-cycles flattened at the top, negative half-cycles full sine]
  4. (4)[figure: graph of V vs t, positive half-cycles full sine, negative half-cycles flattened at the bottom]

Official answer

Option 2

NTA final key (Sep 2020).

Chapter
Semiconductor Electronics: Materials, Devices and Simple Circuits
Topic
Semiconductor Diodes
Idea tested
Zener Diode Regulation

Same idea in other shifts

Asked 15× in all
  1. 2 Apr 2025, Shift 1 · Q45A zener diode with 5 V zener voltage is used to regulate an unregulated dc voltage input of 25 V. For a 400 Ω400\ \Omega resistor connected…MediumSingle correct
  2. 7 Apr 2025, Shift 1 · Q45In the following circuit, the reading of the ammeter will be (Take Zener breakdown voltage = 4 V)MediumDiagram basedHas a figure
  3. 8 Apr 2024, Shift 2 · Q60A potential divider circuit is connected with a dc source of 20 V, a light emitting diode of glow in voltage 1.8 V and a zener diode of…MediumNumerical valueHas a figure
  4. 29 Jan 2024, Shift 1 · Q48In the given circuit, the breakdown voltage of the Zener diode is 3.0 V. What is the value of IzI_z?MediumDiagram basedHas a figure
  5. 30 Jan 2024, Shift 1 · Q48A Zener diode of breakdown voltage 10 V is used as a voltage regulator as shown in the figure. The current through the Zener diode is :MediumDiagram basedHas a figure
  6. 26 Jul 2022, Shift 1 · Q60In the circuit shown below, maximum zener diode current will be __________ mA.MediumNumerical valueHas a figure
  7. 29 Jul 2022, Shift 2 · Q58A 8 V Zener diode along with a series resistance R is connected across a 20 V supply (as shown in the figure). If the maximum Zener…MediumNumerical valueHas a figure
  8. 24 Jun 2022, Shift 2 · Q55In the given circuit, the value of current ILI_L will be ________ mA. (When RLR_L = 1kΩ\Omega)MediumNumerical valueHas 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 108 of the 174 JEE Main shifts held from 2017 to 2026.