Electricity & Electromagnetism

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Transcript Electricity & Electromagnetism

Electricity
Electrical principles
• Electrical charge
• Positive and negative
Electrical circuit
• Source of energy
• Unbroken path
• A load (energy is used)
Electrical Units
• Electrical current
– The Amp ‘A’
• Electrical Voltage
– The Volt ‘V’
Electrical Power
• Electrical Resistance
– The Ohm ‘’
• Electrical Energy
– The Watt ‘W’
• Electrical Power
– The Kilo Watt Hour ‘KwH’
Types of Current
• Alternating Current (AC)
• Direct Current (DC)
• Earthing
Electrical Components
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Batteries
Conductors
Insulators
Switches
Electromagnets
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.