Magnetic force is force exerted by magnets

1. What do magnet
attracts?

2. What will happen
if the magnet will
go far from the
object?

3. How
Magnetic
Force Works

4. The history of magnetism dates back to earlier
than 600 B.C.,but it is only in the twentieth century
that scientists have begun to understand it, and
develop technologies based on this understanding.
Magnetism was most probably first observed in a
form of the mineral magnetite called lodestone,
which consists of iron oxide-a chemical compound
of iron and oxygen. The ancient Greeks were the
first known to have used this mineral, which they
called a magnet because of its ability to attract
other pieces of the same material and iron.

5. William Gilbert
The Englishman (1540-
1603) was the first to
investigate the
phenomenon of magnetism
systematically using
scientific methods. He also
discovered that the Earth is
itself a weak magnet.

6. German Carl
Friedrich
Gauss
Early theoretical
investigations into the
nature of the Earth's
magnetism were
carried out by him
(1777-1855).

7. Frenchman
Charles
Coulomb
Quantitative studies of magnetic
phenomena initiated in the eighteenth
century by him (1736-1806), who
established the inverse square law of
force, which states that the attractive
force between two magnetized objects
is directly proportional to the product
of their individual fields and inversely
proportional to the square of the
distance between them.

8. Danish physicist
Hans Christian
Oersted(1777-1851)
first suggested a link
between electricity
and magnetism.

9. Experiments involving
the effects of magnetic
and electric fields on
one another were then
conducted by
Frenchman Andre
Marie Ampere (1775-
1836) and Englishman
Michael Faraday (1791-

10. Write M if the following objects
contain magnet or NM if they do not.
1. refrigerator
2. speaker
3. chair
4. basket
5. nail cutter
6. television
7. blanket
8. soap
9. kettle
10. ladle

11. Magnetism
Magnet is something that attracts iron.
Magnetism is the power of the magnet to
attract iron. It is an invisible force.
Magnetic materials or substances are
materials that get attracted towards a
magnet.

12. Magnetic Force
Magnetic force is the
strength exerted by a
magnet which can
attract (pull toward) or
repel (push away) an
object.

13. Magnetic Field
The space where the
magnetic forces work.
The farther you go from
a magnet, the weaker
its magnetic
force becomes.

15. Identify what is being referred to by
the following statements.
1. It is the force exerted by a magnet.
2. It is a magnet that is mined from the earth.
3. It is something that attracts iron.

16. 4. It is the power of a magnet to attract iron.
5. It is the space where magnetic forces work.
6. These are common artificial magnets that
keep their magnetism for a long time.
7. These are magnets that are made or
manufactured by man.

17. 8. These are artificial magnets that are cylindrical
and rectangular.
9. These materials are not attracted towards a
magnet.
10. These materials or substances are attracted
towards a magnet

18. What would be
the result if we
face both poles
from one

19. Explain how magnetic force works by filling in the
missing words. Choose from the words inside the
parentheses.