Discovery of Electricity
Particles of Matter
Law of Conservation of Charge
Charging by Friction
Charging by Contact
Charging by Induction
DISCOVERY OF ELECTRICITY
As early as 600 BC, the ancient already had a
knowledge of electric charge. They knew that
amber, a yellowish mineral, when rubbed
against fur, exhibits a peculiar property that
enables it to attract small pieces of materials
such as feathers.
In 19th century, William Gilbert, observed that
other materials exhibit a similar property. He
found out that glass, when rubbed against silk,
attracts small lightweight pieces of materials.
That electricity can flow through a
substance was discovered by the 17th
century Otto Von Guericke and Stephen
During the mid-1700s, Benjamin
Franklin theorized that electricity is na
kind of fluid that flows from one object to
another. He even speculated that
lightning is a form of electricity.
PARTICLES OF MATTER
e - P +
P + n ±
-It is a property that causes subatomic particles such
as protons and electrons to attract or repel to each
other. Electric Charges move in a flash through a
TWO TYPES OF ELECTRIC CHARGE
1. Positively charged
-lost some electrons
2. Negatively charged
- Gained electrons
*AN EXCESS OR SHORTAGE OF ELECTRONS
PRODUCES A NET ELECTRIC CHARGE.
*CHARGE LOST = CHARGE GAINED
LAW OF CONSERVATION OF
“ Charges cannot be created nor
destroyed, but can be transferred
from one material to another. The
total charge in a system must
-force that acts on charge or the force of attraction or
repulsion between electrically charged objects.
-depends on charge and distance.
“LIKE CHARGES REPEL AND
UNLIKE CHARGES ATTRACT.”
STATIC ELECTRICITY AND CHARGING
STATIC ELECTRICITY is the study of the
behavior of electric charges, including how
charge is transferred between objects.
Charge can be transferred by:
1.What will happen when two like charges
are brought together?
2.How do you describe the usual way by
which a material can gain a positive
3.If you comb your hair and the comb
becomes positively charged, what will
happen to your hair.
4.Which can be attracted by a positively