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Saturday, 31 October

JEE Main 2021 · PhysicsNumerical answerNumerical valueEasyCalculation

JEE Main 18 March 2021, Shift 1, Physics Q26

Question 26 of 90 in this shift, Physics question 26 of 30, Section B.

The circuit shown in the figure consists of a charged capacitor of capacity 3 μ\muF and a charge of 30 μ\muC. At time t=0t=0, when the key is closed, the value of current flowing through the 5 MΩ\Omega resistor is 'xx' μ\muA. The value of 'xx' to the nearest integer is __________.

The figure, in words

Series loop: capacitor C = 3 uF carrying charge q = 30 uC, a 5 M ohm resistor, and a switch (key).

Official answer

2

NTA final key.

Chapter
Electromagnetic Induction
Topic
RC Circuits
Idea tested
Initial Rate of Charging

Same topic in other shifts

All RC Circuits questions
  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. 5 Apr 2024, Shift 1 · Q55The electric field between the two parallel plates of a capacitor of 1.5 μF1.5\ \mu\mathrm{F} capacitance drops to one third of its initial…MediumNumerical value
  3. 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
  4. 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
  5. 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
  6. 29 Jun 2022, Shift 2 · Q37A capacitor is discharging through a resistor RR. Consider in time t1\mathrm{t_1}, the energy stored in the capacitor reduces to half of…MediumSingle correct

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.