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Saturday, 31 October

JEE Main 2021 · PhysicsMultiple choiceSingle correctMediumCalculation

JEE Main 22 July 2021, Shift 2, Physics Q17

Question 17 of 90 in this shift, Physics question 17 of 30, Section A.

Intensity of sunlight is observed as 0.092 Wm−20.092\ \mathrm{Wm^{-2}} at a point in free space. What will be the peak value of magnetic field at that point ? (ε0=8.85×10−12 C2N−1m−2\varepsilon_0 = 8.85\times10^{-12}\ \mathrm{C^2N^{-1}m^{-2}})
  1. (1)1.96×10−81.96\times10^{-8} T
  2. (2)5.885.88 T
  3. (3)2.77×10−82.77\times10^{-8} TOfficial answer
  4. (4)8.318.31 T

Official answer

Option 3

NTA final key.

Chapter
Electromagnetic Waves
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.