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99 Percentile Qs Bank for JEE MainPhysicsMagnetic Effects of Current

Two identical bar magnets of magnetic moment M each, are placed along X and Y -axes, respectively at a distance d from the origin (as shown in the figure). The origin lies on perpendicular bisector of magnet placed on X -axis and on the magnetic axis of magnet placed on Y -axis. If the magnitude of total magnetic field at the origin is B= [ ₀ 4 M d^3 ] , then the value of constant will be d>>l , where l is the length

Options

  1. A2
  2. B1
  3. C3
  4. D5

Correct answer

C. 3

Step-by-step solution

Magnetic field due to axial magnet, B ₁= ₀ 4 2 M d^3 (+Y direction) Magnetic field due to equatorial magnet, B ₂= ₀ 4 M d^3 (+Y direction) So, effective magnetic field aligned & B = B ₁+ B ₂=3 ₀ M 4 d^3 & =3 & aligned

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