Electricity

1
Electricity
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Electrical principles

• Electrical charge
• Positive and negative

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Electrical circuit

• Source of energy
• Unbroken path
• A load (energy is used)

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Electrical Units

• Electrical current
• The Amp A
• Electrical Voltage
• The Volt V

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Electrical Power

• Electrical Resistance
• The Ohm ?
• Electrical Energy
• The Watt W
• Electrical Power
• The Kilo Watt Hour KwH

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Types of Current

• Alternating Current (AC)
• Direct Current (DC)
• Earthing

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Electrical Components

• Batteries
• Conductors
• Insulators
• Switches
• Electromagnets

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Morse code

• 1839 The worlds first commercial telegraph was
  built between Paddington and West Drayton. This
  was also the first commercial use of electricity.
• 1843 Samuel Morse used electricity and it's
  electro-magnetism effect to send messages between
  Washington and Baltimore in the USA.