Answer:

What's In

An ordinary magnet pulls or attracts anything made of iron or steel

towards itself. The only way to make it let go is to pull it off. A lodestone is a

naturally magnetized piece of mineral rock (Villegas, 2009). But you cannot

turn off its magnetic capability. There is, however, a type of magnet that can

be turned on and off. This is called an electromagnet.

Which of the following pieces will stick to the electromagnet? Write your

answers on a separate sheet of paper.

1. An electromagnet is only a

magnet when it has electricity

running through it.

2. If an electromagnet is composed

of a coil of wire and a piece of iron,

which would be the core?

false

coil of wire

true

piece of iron

3. Which electrical appliance at

home would be using an

electromagnet?

4. Which metal is most suitable to

be used in an electromagnet

because it is less expensive?

copper

electric bell

silver

electric bulb