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Saturday, 31 October

JEE Main 2021 · PhysicsMultiple choiceDiagram basedEasyConceptual

JEE Main 31 August 2021, Shift 2, Physics Q15

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

A coil is placed in a magnetic field B⃗\vec{B} as shown below : A current is induced in the coil because B⃗\vec{B} is :

The figure, in words

A circle labelled 'Coil' with arrowheads on its rim at the top-left and top-right (the top-right arrow is labelled 'Induced current'); the symbol B (vector) is written inside the circle.
  1. (1)outward and increasing with time
  2. (2)outward and decreasing with timeOfficial answer
  3. (3)parallel to the plane of coil and increasing with time
  4. (4)parallel to the plane of coil and decreasing with time

Official answer

Option 2

NTA final key.

Chapter
Electromagnetic Induction
Topic
Lenz's Law
Idea tested
Identifying Magnetic Flux Change

Same topic in other shifts

All Lenz's Law questions
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  5. 4 Sep 2020, Shift 1 · Q15A small bar magnet is moved through a coil at constant speed from one end to the other. Which of the following series of observations will…MediumDiagram basedHas a figure

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.