Mrs. Oulton Birt

Mrs. Oulton BirtEnergy and Electrical

Circuits …An Introduction

Electrical Potential(potential Energy)Energy Is the Ability To Do

Work

We are going to look at energy – what it is, how we control and convert it. We need to think about what energy is and what POTENTIAL it has…

http://www.youtube.com/watch?v=Rn470XtSYK0

What Is Energy?

Energy is defined as the ability to produce change or do work, and that work can be divided into several main tasks we easily recognize:

Types of energy…

Energy produces light. Energy produces heat. Energy produces motion. Energy produces sound. Energy produces growth. Energy powers technology.

Forms of Energy

There are many forms of energy, but they all fall into two categories:

Stored (potential) energy Working (kinetic) energy

Potential Energy

Potential Energy is stored energy .There are several forms of potential energy, including:

Potential Energy….

Chemical Energy Stored Mechanical Energy Nuclear Energy Gravitational Energy

Look for signs of energy…http://

www.youtube.com/watch?v=Jnj8mc04r9E

Types of kinetic Energy:

Electrical Energy ex lightning Radiant Energy ex light or

radio waves Thermal Energy, or heat ex

geothermal Motion Energy ex windSound Energy

Kinetic Energy

Kinetic Energy is motion—the motion of waves, electrons, atoms, molecules, substances, and objects.

Now think about it…When we turn on our flashlight, chemical energy

stored in the batteries is converted into… light energy. When we turn on the television, electrical energy

changes into… light and sound. (and a little heat is also produced) When we move a vehicle, the engine converts

the chemical energy stored in the fuel into… heat, sound and kinetic energy. Note that the heat

and the sound that are produced are not desirable. An electric cooker in our homes changes electrical

energy into …. heat and light.