Q100 / 160 · JIPMER 2014 · Physics

Magnetic field at point $O$ will be Figure

  • Correct answer
    A
    $\frac{\mu_0 I}{2 R}$ interior
  • B
    $\frac{\mu_0 I}{2 R}$ exterior
  • C
    $\frac{\mu_0 I}{2 R}\left(1-\frac{I}{\pi}\right)$ interior
  • D
    $\frac{\mu_0 I}{2 R}\left(1+\frac{I}{\pi}\right)$ exterior

Solution

Magnetic field at the centre of circular loop $B=\frac{\mu_0 I}{2 R}$ interior.

Hence, the correct answer is option: 'A'.

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