Question

(a) Why is a series arrangement not used for connecting domestic electrical appliances in a circuit?
​(b) Draw a diagram to show the magnetic field lines around a bar magnet. List any two properties of magnetic field lines.

Answer 1

(a) Magnetic field lines:

Magnetic field is the space around a magnet wherein magnetic force can be felt.

The magnetic field lines of a bar magnet can be mapped using a magnetic compass. The compass can be moved from one pole of the bar magnet to another pole. We can trace the field lines by moving the compass gradually and drawing a corresponding line which the compass would trace while following a particular line of force.

In this activity, we will get a magnetic field pattern around the magnet. This also allows us to see the magnetic field lines leaving the north pole of the magnet and enter its south pole.

(b) A freely suspended magnet always points towards geographical north and geographical south directions because of the magnetism of the earth. It is assumed that a huge bar magnet is placed at the centre of the earth that causes a freely suspended magnet to align in the directions of north and south poles.

Answer 2

Answer:

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i) Two magnetic field lines never interest each other.

ii) Outside the magnet, the magnetic field lines are directed from North pole of the magnet towards the South pole.

iii) The magnetic field lines at any one point give the direction of magnetic field at that point .