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Saturday, 31 October

JEE Main 2022 · PhysicsMultiple choiceSingle correctEasyRecall

JEE Main 25 July 2022, Shift 2, Physics Q40

Question 40 of 90 in this shift, Physics question 10 of 30, Section A.

When you walk through a metal detector carrying a metal object in your pocket, it raises an alarm. This phenomenon works on :
  1. (1)Electromagnetic induction
  2. (2)Resonance in ac circuitsOfficial answer
  3. (3)Mutual induction in ac circuits
  4. (4)Interference of electromagnetic waves

Official answer

Option 2

NTA final key.

Chapter
Alternating Current
Topic
LCR Resonance
Idea tested
Resonance Condition

Same idea in other shifts

Asked 2× in all
  1. 26 Aug 2021, Shift 1 · Q10A series LCR circuit driven by 300 V at a frequency of 50 Hz contains a resistance R=3 kΩ\Omega, an inductor of inductive reactance…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 108 of the 174 JEE Main shifts held from 2017 to 2026.