electricity

Slide 1

• WHAT IS ELECTRICITY?
• it is a form of energy.
• WHERE DOES ELECTRICITY COME FROM?
• To understand this we have to know about atoms and their structure
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Slide 2

• Atoms are made up of protons and neutrons inside a nucleus and electrons moving around this nucleus.
• Protons have positive electric charge.
• Electrons have negative electric charge.
• Neutrons have no charge.
• Electrically charged objects attact or repel each other, depending on their charges.
• How Electrons Become Electricity (Incorporar)

Slide 3

• Static electricity is a form of electricity that doesn´t flow.
• Electrical storms are an example of this kind of electricity.
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Slide 4

• Electrical current is when the electrons move from one object to another.
• Some materials are insulators like plastic or rubber.
• Other materials are conductors such as copper or silver.
• Electrical current can be produced in an electrical circuit. It has the following parts:
• a power source
• wires
• a switch
• a resistor
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Slide 5

• Many inventions have relied on electrical power.
• Thomas Edison started working selling his own newspaper.
• By the age of 15 he was working as a teleghaph operator.
• At the age of 22 he developed his first invention: a sotck ticker for the Exchange.
• Later, he invented a telegraph machine, the phonograph for recording sounds, the carbon microphone and the bulb.
• He worked in motion pictures cameras, car batteries and other inventions and gadgets.
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