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Saturday, 31 October

JEE Main 2021 · PhysicsNumerical answerNumerical valueEasyCalculation

JEE Main 31 August 2021, Shift 1, Physics Q27

Question 27 of 90 in this shift, Physics question 27 of 30, Section B.

A 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.

The figure, in words

Circuit: a 6 V battery on the left side; three 2 k-ohm resistors in series in a vertical column on the right, the lower end of the lowest one connected to a ground symbol and back to the battery's other terminal. A capacitor C = 50 microfarad is connected between the junction above the lowest 2 k-ohm resistor and the bottom wire, i.e. in parallel with the lowest 2 k-ohm resistor.

Official answer

100

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. 27 Aug 2021, Shift 1 · Q10Calculate the amount of charge on capacitor of 4 μ\muF. The internal resistance of battery is 1 Ω\Omega :MediumSingle correctHas 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.