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Saturday, 31 October

JEE Main 2020 · PhysicsMultiple choiceSingle correctEasyCalculation

JEE Main 4 September 2020, Shift 2, Physics Q14

Question 14 of 75 in this shift, Physics question 14 of 25.

A paramagnetic sample shows a net magnetisation of 6 A/m when it is placed in an external magnetic field of 0.4 T at a temperature of 4 K. When the sample is placed in an external magnetic field of 0.3 T at a temperature of 24 K, then the magnetisation will be :
  1. (1)4 A/m
  2. (2)2.25 A/m
  3. (3)1 A/m
  4. (4)0.75 A/mOfficial answer

Official answer

Option 4

NTA final key (Sep 2020).

Chapter
Magnetism and Matter
Topic
No close match in our taxonomy
Idea tested
No close match in our taxonomy

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.