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Saturday, 31 October

JEE Main 2022 · PhysicsNumerical answerNumerical valueHardMulti-step

JEE Main 26 July 2022, Shift 1, Physics Q57

Question 57 of 90 in this shift, Physics question 27 of 30, Section B.

The effective current I in the given circuit at very high frequencies will be __________ A.

The figure, in words

Circuit with a 220 V ac source at the bottom and current arrow I pointing up on the left. Top row, left to right: 8 ohm resistor, 20 mH inductor, 6 microfarad capacitor, 4 ohm resistor, 50 mH inductor, 8 ohm resistor. Bottom row, left to right: 0.5 microfarad capacitor, 1 ohm resistor, 0.8 microfarad capacitor, 4 ohm resistor, 0.8 microfarad capacitor, 2 ohm resistor. Two vertical 0.5 microfarad capacitors join the top row to the bottom row, one between the 20 mH inductor and the 6 microfarad capacitor and one between the 4 ohm resistor and the 50 mH inductor.

Official answer

44

NTA final key.

Chapter
Alternating Current
Topic
LCR Resonance
Idea tested
High-Frequency Blocking in Series LCR

Same topic in other shifts

All LCR Resonance questions
  1. 5 Apr 2026, Shift 2 · Q48A series LCR circuit with R=20 ΩR=20\ \Omega, L=1.6L=1.6 H and C=40 μFC=40\ \mu\mathrm{F} is connected to a variable frequency a.c. source. The…EasyNumerical value
  2. 6 Apr 2024, Shift 1 · Q44Given below are two statements : Statement I : In an LCR series circuit, current is maximum at resonance. Statement II : Current in a…EasyTwo statements
  3. 6 Apr 2024, Shift 2 · Q59For a given series LCR circuit it is found that maximum current is drawn when value of variable capacitance is 2.5 nF. If resistance of…EasyNumerical value
  4. 8 Apr 2024, Shift 1 · Q50A LCR circuit is at resonance for a capacitor C, inductance L and resistance R. Now the value of resistance is halved keeping all other…EasySingle correct
  5. 1 Feb 2024, Shift 1 · Q43In series LCR circuit, the capacitance is changed from C to 4C. To keep the resonance frequency unchanged, the new inductance should be :EasySingle correct
  6. 29 Jan 2024, Shift 1 · Q43A capacitor of capacitance 100 μ100\ \muF is charged to a potential of 12 V and connected to a 6.4 mH inductor to produce oscillations. The…EasySingle 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.