Which of the following statements is not correct about the magnetic field lines?

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Magnetic field lines do not intersect each other

Inside a magnet, the magnetic field lines go from north pole to south pole of the magnet

The magnetic field lines form closed loop

Tangent to the magnetic field lines gives the magnitude of a magnetic field

answer is D.

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Detailed Solution

Tangent to the magnetic field lines gives the direction of a magnetic field.
Magnetic lines of force come from magnets. These lines have some specific characteristics. These properties attach great importance to the magnetic field lines. Some properties of magnetic field lines are given below. The strength of the magnetic field is proportional to the density of the magnetic lines of force. Proportional to the number of magnetic field lines per unit area. Magnetic field lines do not intersect. The magnetic field lines run from the North Pole to the South Pole. Magnetic field lines form a circular closed loop. The direction of the magnetic field at any particular point can be determined by drawing a tangent to the field lines at that given point.

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