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Saturday, 31 October

JEE Main 2024 · PhysicsMultiple choiceSingle correctEasyConceptual

JEE Main 30 January 2024, Shift 1, Physics Q44

Question 44 of 90 in this shift, Physics question 14 of 30, Section A.

The electric field of an electromagnetic wave in free space is represented as E⃗=E0cos⁡(ωt−kz) i^\vec{E} = E_0\cos(\omega t - kz)\,\hat{i}. The corresponding magnetic induction vector will be :
  1. (1)B⃗=E0Ccos⁡(ωt−kz) j^\vec{B} = \frac{E_0}{C}\cos(\omega t - kz)\,\hat{j}Official answer
  2. (2)B⃗=E0Ccos⁡(ωt−kz) j^\vec{B} = E_0 C\cos(\omega t - kz)\,\hat{j}
  3. (3)B⃗=E0Ccos⁡(ωt+kz) j^\vec{B} = \frac{E_0}{C}\cos(\omega t + kz)\,\hat{j}
  4. (4)B⃗=E0Ccos⁡(ωt+kz) j^\vec{B} = E_0 C\cos(\omega t + kz)\,\hat{j}

Official answer

Option 1

NTA final key.

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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.