Question

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Answer 1

Answer:

1

Explanation:

yes,bar magnet are always alinged to north south direction

Answer 2

Explanation:

1 The particular alignment of the compass needle is attributed to the interaction between two magnets. All magnets have two poles, a north pole and a south pole, and the north pole of one magnet is attracted to the sout pole of another magnet and vice-versa. Actually, the compass needle itself is a little magnet with two magnetic poles and the earth acts as a really big magnet due to the magnetic field created by its iron core. The Earth's magnetic south pole lies near to its geographic north and the magnetic south pole near its geographic south. So the compass needle when allowed to spin whichever way it wants, will always line itself along the north-south direction.

2 The strength of an electromagnet depends on:

The strength of the current passing through the coil, the greater the current, the greater the strength. This because the current increases there is more flow of electrons which in turn increases the magnetic field around it.