What are ‘magnetic field lines’? How is the direction of a magnetic field at a point determined ?
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Explanation:
Magnetic lines of force are lines of forces of attraction i.e. create their own attractive force.
Their direction is determined using needle magnet
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Explanation:
The magnetic field lines are the pictorial representation of the strength and direction of the magnetic field.
The direction of the magnetic field at a point can be found by placing a small magnetic compass at that point. The north end of the needle of a compass indicates the direction of magnetic field at a point where it is placed.
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