Science [1 Marks Each] QUE - ANS

Principle of a magnetic compass: When a magnet is suspended freely it comes to rest in North — South direction. Uses of a magnetic compass : It is used to find direction in aeroplanes, ships, deserts, etc.

When the similar (like) poles of two magnets are brought nearer to each other, the magnets start repelling each other.

When the opposite (unlike) poles of two magnets are brought nearer to each other, the magnets start attracting each other.

A bar magnet when suspended freely in the horizontal plane comes to rest in the North-South direction. The pole of the magnet that points in the South direction is the South pole.

A bar magnet when suspended freely in the horizontal plane comes to rest in the North — South direction. The end of the magnet that points in the North direction is the North pole.

A bar magnet suspended freely in the horizontal plane comes to rest in the North — South direction.

No, stainless steel is not attracted by a magnet.

The property of a magnet to attract magnetic substances (e.g. iron, nickel and cobalt) towards it is called magnetism.

The substance that attracts iron objects towards it, is called a magnet.

The ‘magnet’ was first found in Magnesia region of Greece.

Magnetic compass

Near the poles

Repulsion

North direction

Attraction

Iron, cobalt and nickel

Two

Magnesia

Magnes

We will suspend the bar magnet in such a manner that it can rotate freely in the horizontal plane. The bar magnet comes to rest in North — South direction, the ends that point in geographic North is North pole and the end that comes to rest in geographic South is South pole.

The poles of bar magnet are located near its end points.

There is a blade in pencil sharpener which is made up of iron. Iron is a magnetic material. That Is why it is attracted by both the poles of a magnet.