Question

Why magnetic field lines are imaginaye ?
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Answer 1

Answer:

Magnetic field lines are the lines in a magnetic field the tangent of which at any point will give the field direction at that point and its density gives the magnitude of the field. They denote the direction of the magnetic field.

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Answer 2

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Magnetic fields can be pictorially represented by magnetic field lines, the properties of which are as follows:

• The field is tangent to the magnetic field line.
• Field strength is proportional to the line density.
• Field lines cannot cross.
• Field lines are continuous loops.