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Properties of magnetic lines of force are:
The imaginary lines which represent the direction of magnetic field, are known as magnetic lines of force.
Outside the magnet their direction is from north pole to south pole and inside the magnet these are from south to north pole.
All
Magnetic lines of force are closed curves.

A

The imaginary lines which represent the direction of magnetic field, are known as magnetic lines of force.

B

Magnetic lines of force are closed curves.

C

All

D

Outside the magnet their direction is from north pole to south pole and inside the magnet these are from south to north pole.

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Solution

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Properties of magnetic lines of force are:
The imaginary lines which represent the direction of magnetic field, are known as magnetic lines of force. Magnetic lines of force are closed curves. Outside the magnet their direction is from north pole to south pole and inside the magnet these are from south to north pole.They neither have origin nor end. These lines do not intersect, because if they do so then it would mean two value of magnetic field at a single point, which is not possible. At the poles of the magnet the magnetic field is stronger because the lines of force there are crowded together and away from the poles the magnetic field is weak.

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Q1

State whether true or false :

Outside the magnet, the magnetic lines of forces pass from north pole to the south pole and inside the magnet, they pass from south to the north pole.

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Q2

Assertion :Magnetic lines of force form continuous closed loops. Reason: Magnetic poles always occur in pairs as north pole and south pole.

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(a) Define magnetic field lines. Describe an activity to draw a magnetic field line outside a bar magnet from one pole to another pole.
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Q5

Question 1
Choose the incorrect statement from the following regarding magnetic lines of field.

(a) The direction of magnetic field at a point is taken to be the direction in which the north pole of a magnetic compass needle points
(b) Magnetic field lines are closed curves
(c) If magnetic field lines are parallel and equidistant, they represent zero field strength
(d) Relative strength of magnetic field is shown by the degree of closeness of the field lines

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