ELECTRICITY MODULES Through Cognitive Learning

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ELECTRICITY MODULES(Through Cognitive Learning)

• ENGINEERING TECHNOLOGY

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MODULE 3 - VOLTAGE(series and parallel)

• Devices
• Batteries (charge in coulombs)
• Car Lighters
• Wall Outlets Potential Energy
• Equipment
• Meters Oscilloscopes
• Power Supplies
• Transformers

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Voltage

• A battery has negative (-)charge on one terminal
  and positive () charge on the other.
• There is a potential difference between the
  battery terminals
• If a load resistance is connected between the
  terminals the potential difference causes
  electrons to flow creating a voltage drop on the
  load equal to the battery voltage but opposite in
  polarity.

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Electric Potential Difference

• The potential difference is defined as the work
  done per unit charge to move a charged particle
  from one position to another.
• V 1 joule (w)/ 1 coulomb (q) w/q
• Unit of potential difference volt (v)

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Potential Difference, V

• A charged particle placed in a region of
  potential difference will be accelerated and work
  will be done on the particle.
• w DKE qv
• A special unit used later in course is the
  electron volt (eV)
• 1 eV 1.602 x 10-19 J
• 1J 6.25 x 1018 eV