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Friday, 9 October

JEE Main 2021 · PhysicsNumerical answerNumerical valueEasyCalculation

JEE Main 3 August 2021, Shift 2, Physics Q28

Question 28 of 90 in this shift, Physics question 28 of 30, Section B.

As the switch S is closed in the circuit shown in figure, current passed through it is ‾\underline{\hspace{2em}} A.

The figure, in words

10 V terminal connected through a 4 ohm resistor to a junction; the junction connects through a 2 ohm resistor to a 5 V terminal; from the junction a branch with a 2 ohm resistor and switch S leads to ground.

Official answer

2

NTA final key.

Chapter
Current Electricity
Topic
Kirchhoff's Laws
Idea tested
Nodal Analysis Technique

Same topic in other shifts

All Kirchhoff's Laws questions
  1. 2 Apr 2026, Shift 2 · Q38Two resistors of 200 Ω\Omega and 400 Ω\Omega are connected in series with a battery of 100 V. A bulb rated at 200 V, 100 W is connected…MediumSingle correct
  2. 4 Apr 2026, Shift 1 · Q43The voltage and the current between AA and BB points shown in the circuit are ______.MediumDiagram basedHas a figure
  3. 5 Apr 2026, Shift 1 · Q34Refer to the figure given below. The values of I1I_1, I2I_2 and I3I_3 are ________.MediumDiagram basedHas a figure
  4. 5 Apr 2026, Shift 1 · Q38Refer to the figure given below, current between terminals AA and BB is ________ A.MediumDiagram basedHas a figure
  5. 5 Apr 2026, Shift 2 · Q49When an external resistance of 5 Ω\Omega is connected across terminals of a cell, a current of 0.25 A flows through it. When the 5…EasyNumerical value
  6. 6 Apr 2026, Shift 1 · Q46Refer to the circuit diagram given below. The heat generated across the 6 Ω6\ \Omega resistance in 100 second is α100\frac{\alpha}{100} J.…HardNumerical 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 42 of the 174 JEE Main shifts held from 2017 to 2026.