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PhysicsJEE Main 6 Apr 2026, Shift 1·Q17·MCQ·Easy–moderate

Moving Charges and Magnetism · Sources of magnetic field

A small cube of side 1 mm is placed at the centre of a circular loop of radius 10 cm carrying a current of 2 A. The magnetic energy stored inside the cube is α×10−14\alpha\times10^{-14} J. The value of α\alpha is . (μ0=4π×10−7\mu_0 = 4\pi\times10^{-7} Tm/A, π=3.14\pi = 3.14)
  1. (1)6.28
  2. (2)6.28×10−66.28\times10^{-6}
  3. (3)628
  4. (4)6.28×10−46.28\times10^{-4}

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