class 6 ch.no. 13 Fun with magnets

Which is an example of a magnetic substance?

• Iron

• Nickel

• Cobalt

• All of these

A freely suspended bar magnet rests in

• north-south directions

• east-west directions

• upside down

• any direction by chance

Attraction is seen between the poles of two bar magnets in the case of

• N-pole of one magnet with N-pole of other

• N-pole of one magnet with S-pole of other

• S-pole of one magnet with S-pole of other

• all of these cases will show attraction

Which is a natural magnet?

• Magnetite

• Haemetite

• Bakelite

• Copper

The magnetic properties of a magnet cannot be destroyed by

• hammering

• heating

• dropping on a hard surface

• boiling

Magnetic needle of compass always points towards north direction because

• it is a natural property of magnet

• . Earth behaves as a magnet

• north direction attracts north pole

• south direction attracts north pole

Earth acts like a giant magnet because its center is made up MOSTLY of

• granite

• limestone

• iron

• nickel

A magnet is broken into 7 pieces. How many north poles are formed from these seven pieces?

• 2 poles

• 6 poles

• 5 poles

• 7 poles

A bar magnet is brought close to some iron fillings. Then which of the given options is/are correct regrading the attraction of iron fillings by the bar magnet?

• It is minimum at poles.

• It is maximum at centre.

• It is minimum at centre.

• It is maximum at poles.

A bar magnet is cut into six pieces. Which one of the following is correct?

• Each piece lost its magnetism.

• Half of the pieces have only south pole.

• Each piece is a magnet.

• Half of the pieces have only north pole.