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Friday, 9 October

JEE Main 2023 · PhysicsMultiple choiceSingle correctEasyRecall

JEE Main 13 April 2023, Shift 2, Physics Q50

Question 50 of 90 in this shift, Physics question 20 of 30, Section A.

To radiate EM signal of wavelength λ\lambda with high efficiency, the antennas should have a minimum size equal to :
  1. (1)2λ2\lambda
  2. (2)λ\lambda
  3. (3)λ2\frac{\lambda}{2}
  4. (4)λ4\frac{\lambda}{4}Official answer

Official answer

Option 4

NTA final key.

Chapter
Communication Systems
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 42 of the 174 JEE Main shifts held from 2017 to 2026.