Various sources are used to provide electricity to power homes and devices. Hydroelectric power plants use the kinetic energy of falling water to turn turbines which rotate generators, producing electrical current. Other power sources like fossil fuels, nuclear reactions, wind and tides also use generators, converting the energy of motion into electrical energy. Generators have electromagnets surrounded by coils of wire, and their rotation produces the flow of electrons that becomes electricity. Electricity travels through power lines to homes where it powers various appliances and devices. The amount of electrical energy used can be calculated using the power rating and running time of devices.

2. SOUTH
NORTH
Electricity and Magnetism
What is it?
ELECTRICITY AND MAGNETISM

3. Electricity
• Electricity figures everywhere in our lives.
Electricity lights up our homes, cooks our
food, powers our computers, television sets,
and other electronic devices. Electricity from
batteries keeps our cars running and makes
our flashlights shine in the dark.
• Here's something you can do to see the
importance of electricity. Take a walk through
your school, house or apartment and write
down all the different appliances, devices and
machines that use electricity. You'll be amazed
at how many things we use each and every
day that depend on electricity.

4. Magnetism
• a physical phenomenon produced by the
motion of electric charge, resulting in
attractive and repulsive forces between
objects.

5. Electricity- the movement of electrons from
one atom to another.
electron
ProtonsNeutrons

6. ATOM 1 ATOM 2

7. Two types of Electricity
• Current electricity
• Static electricity
Electricity that is produced by flowing electrons.
Electric discharge resulting from the
accumulation of electric charge on an isulated
body.

8. Current Electricity
Examples that uses current electricity:
-flashlights
-indicasent light
-phones
-electric fan
-computer
-and other appliances or devices or whatever..

9. Static Electricity
• Examples of Static Electricity

10. • But what is the relationship
between electricity and
magnetism? Where does it come
from? How does it work?
Remember:
Almost all electricity power
plant uses generator as a source of
electricity except Solar Energy Power
Plant,where generator have always a
magnet relation to the coil that
electrons can flow.

11. Various sources of energy are utilized to provide
electricity to power our households.For example
the tremendous energy produced by falling water is
used by water turbines to rotate the large
generators at a hydroelectric power plant.
As the water falls from the reservior,its kinetic
energy increases and it flows very fast .The falling
stream of water turns a fan-like device called a
turbine ,which is connected to the genarator ‘s
shaft.
The rotation of the shaft turns powerful
electromagnets that sorrounded by a coil of copper
wires.The coil is connected t a step-up transformer
that sends high voltage current to power lines.
Other sources of energy at power plants include
steam from burning fossil fuels,nuclear reactions wind
and ocean tides.Each source provides the energy of
motion to turbines then to generators,producing
electrical energy.Power plants,in general use
generators to convert kinetic energy into electrical
energy.One specific source,however,uses solar panels
made of photo voltaic cells to convert sunlight into
electrical energy instead of turbines.
List of Electricity Power
plants/Source
Hydroelectric Power plant
Nuclear Power plant
Diesel Powered plant
Geothermal Power plant
Wind
Wave
Solar
ETC….

12. How electricity gets into our home

13. Calculating Electrical Energy Consumption
One of the factors to be consider is the POWER rating of
your appliance.For instance,the power rating of an
appliance depends on both voltage and a current.
FORMULA;
P=VI
where P is power measured in (watts)
V is voltage measured in (volts)
I is current measured in (amperes)

14. FORMULA for energy;
E=Pt
Where E is energy measured in (KWh)
P is power
t time
As usual we can derive this formula to get ETC..

15. All of the computers in an ICT room are in
use for 5 hours everyday and together use 8.3
kilowatts.How much energy is used in a day?
Given:
P= 8.3 kW Cost= (41.5)10 Pesos/kWh
T= 5h = 415 Pesos
Find energy used:
E= Pt
=( 8.3 kW)(5h)
E= 41.5 kWh

16. If we have seen further it is by standing
on the shoulders of giants