Science
Kelas 4 Semester 1 Sekolah Dasar
Magnet
A Magnet is a meterial or object that produces a magnetic field
Two Major Types Of Magnet :
1.)
Permanent
Magnet —› long period of time
2.) Temporary Magnets —› only under certain conditions
Shape Magnets :
1)
Bar Magnet
2)
Horse – Shoe
Magnet
3)
Magnetic Needle
4)
Ring Magnetic
5)
Disk Magnetic
6)
Cylinder Magnet
The object attracted by a magnet
Iron
Steel ( made from iron , nickel , cobalt )
Cobalt
Nickel
Magnet have two unlike poles
North
South
Unlike poles attract
and like poles repels
The
force in the end of the magnet attracting very strong, and in the middle weak
The area around a magnet where the magnetic force act is called the magnetic field
- Can not be seen
- Can not be hear
- Can not touch
- No order and no taste
We can feel the effect of magnetic
field when you bring on object and you can see it's effect, a magnetic field is
formed by the magnetism that radiates from a magnet.
Magnetic Material —› Can attract by magnet : Iron , steel , cobalt , nickel
Non Magnetic Material —› Can’t attract by magnet : Alumunium , gold , silver , rubber , fabric ,wood , plastic , brick , ceramic
S - Poles of A and S – Poles of B
Put the stone around magnetic material to know is it magnet or not
The Earth is a Huge Magnet
Use compass should do know the magnet pole
Bermanfaat 👍🏻
BalasHapus