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NEET 1994 (AIPMT) · Current Loop as a Magnetic Dipole

Current Loop as a Magnetic Dipole question from NEET 1994 (AIPMT)

Q84NEET 1994 · AIPMTEasy

Current Loop as a Magnetic Dipole

A circular loop of area 0.01 m20.01\text{ m}^2 carrying a current of 10 A10\text{ A}, is held perpendicular to a magnetic field of intensity 0.1 T0.1\text{ T}. The torque acting on the loop is

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Answer: (c)

  1. τ=nIABsin⁡θ\tau = nIAB\sin\theta, where θ\theta is the angle between the area vector and B⃗\vec B.
  2. Plane perpendicular to B means A⃗∥B⃗\vec A \parallel \vec B, so θ=0\theta = 0.
  3. τ=0\tau = 0, so the answer is (c).
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