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Saturday, 31 October

JEE Main 2022 · PhysicsMultiple choiceSingle correctMediumCalculation

JEE Main 29 June 2022, Shift 2, Physics Q39

Question 39 of 90 in this shift, Physics question 9 of 30, Section A.

Two long current carrying conductors are placed parallel to each other at a distance of 8 cm between them. The magnitude of magnetic field produced at mid-point between the two conductors due to current flowing in them is 300 μT\mu T . The equal current flowing in the two conductors is :
  1. (1)30A in the same direction.
  2. (2)30A in the opposite direction.Official answer
  3. (3)60A in the opposite direction.
  4. (4)300A in the opposite direction.

Official answer

Option 2

NTA final key.

Chapter
Moving Charges and Magnetism
Topic
Biot-Savart Law
Idea tested
Infinite and semi-infinite wires

Same idea in other shifts

Asked 4× in all
  1. 4 Apr 2024, Shift 2 · Q54Two parallel long current carrying wire separated by a distance 2r2r are shown in the figure. The ratio of magnetic field at AA to the…MediumNumerical valueHas a figure
  2. 27 Jan 2024, Shift 1 · Q57Two long, straight wires carry equal currents in opposite directions as shown in figure. The separation between the wires is 5.0 cm. The…EasyNumerical valueHas a figure
  3. 29 Jul 2022, Shift 2 · Q36A wire X of length 50 cm carrying a current of 2 A is placed parallel to a long wire Y of length 5 m. The wire Y carries a current of 3 A.…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. Lumi analyses 108 of the 174 JEE Main shifts held from 2017 to 2026.