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Saturday, 31 October

JEE Main 2024 · PhysicsNumerical answerNumerical valueEasyCalculation

JEE Main 27 January 2024, Shift 1, Physics Q57

Question 57 of 90 in this shift, Physics question 27 of 30, Section B.

Two long, straight wires carry equal currents in opposite directions as shown in figure. The separation between the wires is 5.0 cm. The magnitude of the magnetic field at a point P midway between the wires is ________ μ\muT. (Given : μ0=4π×10−7\mu_0 = 4\pi\times10^{-7} TmA−1^{-1})

The figure, in words

Two parallel vertical long wires; left wire carries 10 A upward, right wire carries 10 A downward; point P midway between them.

Official answer

160

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. 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
  3. 29 Jun 2022, Shift 2 · Q39Two long current carrying conductors are placed parallel to each other at a distance of 8 cm between them. The magnitude of magnetic field…MediumSingle correct

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. This question needs a figure we do not reproduce; it is described in words above. Lumi analyses 108 of the 174 JEE Main shifts held from 2017 to 2026.