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Friday, 9 October

JEE Main 2021 · PhysicsMultiple choiceSingle correctMediumConceptual

JEE Main 18 March 2021, Shift 1, Physics Q15

Question 15 of 90 in this shift, Physics question 15 of 30, Section A.

In a series LCR resonance circuit, if we change the resistance only, from a lower to higher value :
  1. (1)The resonance frequency will increase
  2. (2)The bandwidth of resonance circuit will increaseOfficial answer
  3. (3)The quality factor will increase
  4. (4)The quality factor and the resonance frequency will remain constant

Official answer

Option 2

NTA final key.

Chapter
Alternating Current
Topic
LCR Resonance
Idea tested
Resistance Effect on Resonance Curve

Same idea in other shifts

Asked 2× in all
  1. 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

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 42 of the 174 JEE Main shifts held from 2017 to 2026.