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Question: Answered & Verified by Expert
A current of 1.5 A is flowing through a triangle, of side 9 cm each. The magnetic field at the centroid of the triangle is :
(Assume that the current is flowing in the clockwise direction.)
PhysicsMagnetic Effects of CurrentJEE MainJEE Main 2021 (31 Aug Shift 2)
Options:
  • A 23×10-5 T, inside the plane of triangle
  • B 23×10-7 T, outside the plane of triangle
  • C 3×10-7 T, outside the plane of triangle
  • D 3×10-5 T, inside the plane of triangle
Solution:
1987 Upvotes Verified Answer
The correct answer is: 3×10-5 T, inside the plane of triangle

B1=μ0I4πR2sin60=4π×10-7×1.54π.332×10-2×2×32=1×10-5
Bnet=3B1=3×10-5T

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