Chapter 8 Quiz

Which is the correct statement to describe a magnet?

• Any materials that can attract iron and producing a magnetic field outside itself.

• Any materials that have two poles such as positive and negative or north and south.

• A material that was made from iron, nickel, or cobalt.

• Any materials that can be categorized as diamagnetic, paramagnetic, or ferromagnetic.

How does the magnet in this magnetic fishing game work?

• The magnet on the fishing rod attracts the iron in the mouth of the fish.

• The magnet on the fishing rod only has the north pole, and the magnet on the fish only has the south pole.

• All the parts of the toy have to be made from a permanent magnet.

• The electricity current from the fishing rod will attract the fish.

Bar magnet, horseshoe magnet, disc magnet, etc. are examples of magnets that were classified based on its.....

• shape

• purpose

• strength

• size

Group A attract by a magnet.

Group B cannot attract by a magnet.

Which group will an object make of rubber put on?

• A

• B

• depend on its size

• depend on its shape

The metal that rubbed to make it become a magnet should be _____.

• aluminum

• iron

• graphite

• copper

To change the metal becomes a magnet, how we need to do the stroke?

• do in two direction

• do in a single direction

• do in a zigzag path

• single time each day

In this method, how to make the metal become a stronger magnet?

• always do a double direction

• the longer to rub

• use longer metal

• use diamagnetic metal

The metal that becomes a magnet through this process can be demagnetized. Thick all the following ways that demagnetize it.

• hammered it

• heat it in a high temperature

• pass an electric current through it

• use it to attract iron

What is the technique used in the picture to make a magnet?

• single touch

• double touch

• induction

• electro magnet

What will happen if the magnet is separated from the iron nail?

• the iron nail will become a magnet

• the iron will keep the paper clips attracted

• the magnetism of the nail will decreasing or lose

• the poles of the magnet will be changed