Electricity An Introduction Electricity Electricity is very important

Electricity (An Introduction)

Electricity • Electricity is very important in our lives. • We would find it very hard to do without it. • There are so many things in our homes that are powered by electricity that we have begun to depend on them. • Imagine you woke up this morning and had no electricity. What difference would it make to your normal morning routine?

Life without Electricity---!!! • How would you prepare your lunch? • How would you wash clothes? • When would you go to bed? • Think about all the luxuries the discovery of Electricity has brought us! – No Television – No Radio – No Lights

What is Electricity? • Electricity is generated from the motion of tiny charged atomic particles called electrons and protons! • Protons = + • Electrons = -

Remember “Atoms”…? ! • Have neutrons, neutrons protons, protons and electrons • Protons are positively charged. • Electrons are negatively charged.

protons Protons are positively charged particles located inside the nucleus of an atom.

electrons Electrons are negatively charged particles circulating outside of the nucleus.

Electrons… • In an atom electrons move around outside the nucleus. (Are located on the outer edges of atoms…they can be moved. ) moved • In some elements, electrons can also move from 1 atom to another. A concentration of electrons in an atom creates a net negative charge. • If electrons are stripped away, the atom becomes positively charged. • Electrons movement produces electricity.

ELECTRICITY The movement of electrons from one place to another or it is a form of energy produced by moving electrons. • e- movement negatively charged area positively charged area

ELECTRICAL FORCES A force that one charge exerts on another • e- and p+ - attract one another - Opposite charges attract (+ and - charges) • e- and e- or p+ and p+ - repel one another - Like charges repel (- and - charges)

Electricity can be changed to other types of Energy • • Heat energy Light energy Sound energy Movement energy • Can you think up some examples for each type of energy?

Heat Energy

Light Energy

Sound Energy

Movement Energy (electric motors)

Battery Power • Many small electrical appliances use batteries. • Batteries are also a source of electrical energy • Battery powered appliances also convert electrical energy into heat, light, sound and movement energy • Can you think of some battery powered appliances for each source of energy?