Download UNIT 2 THE BODY

UNIT 5
ELECTRICITY
AND
MAGNETISM
MAGNETS
An object which atracts other objects made of iron
or mixtures of iron such as steel. This atraction is
called MAGNETISM
NATURAL
MAGNETS
MINERAL
MAGNETITE
ARTIFICIAL
MAGNETS
MANUFACTURED
FROM METALS
MAGNETS HAVE TO POLES: NORTH AND SOUTH
Opposite poles attract. Same poles repel
LIKEWISE ELECTRICAL CHARGES
MAGNETIC FIELD:
Space created by a magnet around itself where
materials such as iron are affected by magnetic forces.
Electromagnet:
A conducting wire wrapped around a piece of iron
called a coil, which acts as a magnet when electrical
current flows through it.
True or false? Copy and correct the wrong
ones.
A magnet is an object that can attract all types of
objects____.
Magnets have two poles______
Opposite magnetic poles repel each other________
To make an electromagnet, you only need a
conducting wire ___________.
Magnetic strips store information on credit cards
_______
True or false? Copy and correct the wrong
ones.
1. A magnet is an object that can attract all types of
objects_F_. They attract objects made of iron.
2. Magnets have two poles__T_
3. Opposite magnetic poles repel each other_F_
They attract each other.
4. To make an electromagnet, you only need a
conducting wire _F_. You also need a coil (piece of iron)
5. Magnetic strips store information on credit cards _T__
Answer these
questions
1. What is a magnet?.
2. What happens when the opposite poles of two
magnets are placed together?
3. What happens when the same poles of two
magnets are placed together?
4. How are magnets used?
5. Describe the magnetic field generated by a magnet:
1. What is a magnet?.
A magnet is an object which can attract objects
made of iron or mixtures of iron.
2. What happens when the opposite poles of two
magnets are placed together?
The magnets attract each other.
3. What happens when the same poles of two magnets
are placed together?
The magnets repel each other.
4. How are magnets used?
Magnets are used in many different objects,
like the electric motors, generator,
telephones…
5. Describe the magnetic field generated by a magnet:
It is the space around a magnet where
materials are affected by the magnetic forces.