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Saturday, 31 October

JEE Main 2021 · PhysicsMultiple choiceSingle correctMediumMulti-step

JEE Main 27 August 2021, Shift 1, Physics Q10

Question 10 of 90 in this shift, Physics question 10 of 30, Section A.

Calculate the amount of charge on capacitor of 4 μ\muF. The internal resistance of battery is 1 Ω\Omega :

The figure, in words

Circuit with three parallel branches between the same two side wires: top branch has a 4 μ\muF capacitor in series with a 6 Ω\Omega resistor, then in series with a parallel pair of two 2 μ\muF capacitors; middle branch has a 5 V battery; bottom branch has a 4 Ω\Omega resistor.
  1. (1)zero
  2. (2)4 μ\muC
  3. (3)8 μ\muCOfficial answer
  4. (4)16 μ\muC

Official answer

Option 3

NTA final key.

Chapter
Electrostatic Potential and Capacitance
Topic
RC Circuits
Idea tested
Initial and Steady State Behavior

Same idea in other shifts

Asked 7× in all
  1. 5 Apr 2026, Shift 2 · Q37Under steady state condition the potential difference across the capacitor in the circuit is __________ V.MediumSingle correctHas a figure
  2. 1 Feb 2024, Shift 2 · Q41A galvanometer (G) of 2 Ω2\,\Omega resistance is connected in the given circuit. The ratio of charge stored in C1C_1 and C2C_2 is :MediumDiagram basedHas a figure
  3. 1 Feb 2024, Shift 2 · Q56In an electrical circuit drawn below the amount of charge stored in the capacitor is ________ μ\muC.MediumNumerical valueHas a figure
  4. 8 Apr 2023, Shift 1 · Q49In this figure the resistance of the coil of galvanometer G is 2 Ω2\ \Omega. The emf of the cell is 4 V4\ \mathrm{V}. The ratio of potential…MediumDiagram basedHas a figure
  5. 31 Aug 2021, Shift 1 · Q27A capacitor of 50 μ\muF is connected in a circuit as shown in figure. The charge on the upper plate of the capacitor is __________ μ\muC.EasyNumerical valueHas a figure
  6. 2 Apr 2017 (offline) · Q16In the given circuit diagram when the current reaches steady state in the circuit, the charge on the capacitor of capacitance C will be :EasySingle correctHas 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.