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Saturday, 31 October

JEE Main 2021 · PhysicsNumerical answerNumerical valueEasyCalculation

JEE Main 26 February 2021, Shift 1, Physics Q30

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

In a series LCR resonant circuit, the quality factor is measured as 100. If the inductance is increased by two fold and resistance is decreased by two fold, then the quality factor after this change will be __________.

Official answer

283

NTA final key.

Chapter
Alternating Current
Topic
LCR Resonance
Idea tested
Q-Factor Formula in LCR

Same idea in other shifts

Asked 2× in all
  1. 30 Jun 2022, Shift 1 · Q46In series RLC resonator, if the self inductance and capacitance become double, the new resonant frequency (f2f_2) and new quality factor…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. Lumi analyses 108 of the 174 JEE Main shifts held from 2017 to 2026.