What is/are the properties of magnetic lines of force?

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Magnetic field lines have both direction and magnitude

The field lines originate from the north pole and merge at the south pole

The magnetic field’s strength is indicated by the closeness of the field lines.

All of these

answer is D.

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Detailed Solution

The attributes of magnetic lines of force are that they have both direction and magnitude, the field lines emerge from the north pole and merge at the south pole, and the strength of the magnetic field is shown by the degree of closeness of the field lines.
Magnetic field lines have both direction and magnitude. The direction of the magnetic field is shown by the tangent drawn at any point on the curve. The field lines originate from the north pole and merge at the south pole. Inside the magnet, they move from south to north. So, they form a continuous closed loop. The magnetic field’s strength is explained by the degree of closeness of the field lines. The closer the lines, the more the strength will be; the farther the lines, the lesser the field strength will be.

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