Physics · JEE | Magnetism and Matter

Using the electrostatic analogy, what is the equatorial magnetic field \( B_E \) of a short bar magnet of magnetic moment \( m \) at a distance \( r \) (\( r \gg l \))?

1. A
   \( \frac{\mu_0 m}{4\pi r^3} \)
2. B
   \( -\frac{\mu_0 m}{4\pi r^3} \)
3. C
   \( -\frac{\mu_0 2m}{4\pi r^3} \)
4. D
   \( \frac{\mu_0 2m}{4\pi r^3} \)