Notesale: Turn your study into money

Document Preview

Extracts from the notes are below, to see the PDF you'll receive please use the links above

---

A–Z
SCHOOL J
...
S
DEPARTMENT
OF SCIENCE
FORM TWO
ELECTRICAL
ENERGY

A – Z SCHOOL
THIRD TERM FORM TWO (2)
ELECTRICAL ENERGY
NB; 1
...

2
...

Learning Objectives
After studying this unit, you should be able to;
• Describe ways of generating electrical energy
...

• Demonstrate the flow of current using a simple electrical circuit
...

• Explain ways of conserving electrical energy
...

Some of the forms of energy are light energy, heat energy, electrical energy and sound energy
...

Electrical energy is a form of energy that enables charged particles known as electrons to move by
flowing through a medium that conducts electricity, known as a conductor
...
There are two types of electric current; direct current (DC) and alternating
current (AC)
...

DEFINITIONS OF SOME BASIC TERMS
• ELECTRICAL ENERGY; is the energy produced as a result of movement of electrons
...

• ELECTRIC CURRENT; is the flow of charges (electrons) per second
...

• ELECTROMOTIVE FORCE (E
...
F); is the source that provides the force necessary to move an
electron to generate electricity
...
electrical
energy has sources as well
...
Solar panels/solar energy
2
...
Hydroelectric power
4
...
Fuel cells
6
...
Voltaic cells
Let’s consider each of these sources of electrical energy
...

Solar cells are devices, which turn the sun’s radiant energy into electricity
...

WINDMILLS
A windmill is a machine designed to convert the energy of the wind to either pump water or
produce electricity
...

Turbines is a machine for producing continuous power in which a wheel or rotor, typically fitted
with vanes, is made to revolve by a fast-moving flow of water, stream, gas, air, or other fluid
...
Hydroelectric dams produces
electrical power through the use of the gravitational force of falling water or flowing water
(kinetic energy)
...
The power generated depends on the volume and difference in height
between the source and the water’s outflow
...
In Ghana the Akosombo Dam and Kpong Dam generate electricity
for the nation
...

Generators may produce direct current (D
...
) or alternating current (A
...
Direct current occurs
when current flows in the same direction all the time

---