Magnetic field lines at the centre of a circular loop are [[1]] to the plane of the loop.

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Detailed Solution

Magnetic field lines at the centre of a circular loop are perpendicular to the plane of the loop.
Magnetic field lines explain the direction of the magnetic field around a magnet.
Magnetic field lines at the centre of a circular loop are perpendicular to the plane of the loop. When we place our thumb in the direction of the current, the band fingers will show the direction of magnetic field lines, in this way these magnetic field lines will pass perpendicular to the centre of the coil.

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