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Mod4 l2.2

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electronics concept

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Mod4 l2.2

  1. 1. MODULE 4_ DIAGNOSE & TROUBLESHOOT COMPUTER SYSTEM (DT) LESSON 2_ DIAGNOSE & CONFIGURE COMPUTER SYSTEMS
  2. 2. Basic Electrical Terms Electricity is define as the flow of electron or electric current. It is an invisible form of energy that can be transform into other form of energy like heat light and mechanical.
  3. 3. Basic Electrical Terms Electron is the negatively charge component of an atom. It has the ability to flow. Proton is the positively charge component of an atom. It had the ability to attract electron.
  4. 4. Basic Electrical Terms Current  Same as electricity.  Can be measure in Ampere (I) Voltage  amount of pulling force that makes the electron flow  Also known as potential difference or EMF  Can be measured in volt (V)
  5. 5. Basic Electrical Terms Resistance define as the opposition to the flow of current. The amount of resistance can be measure in ohms (Ω).
  6. 6. Basic Electrical Terms Conductors are materials that easily allow the flow of current, or it has a low resistance to current flow. (e.g. Al, Au, Ag, Cu, Fe. Insulators are materials that do not easily allow the flow of current, or it has a high resistance to current flow. (e.g. rubber, plastic, paper)
  7. 7. Types of Current Direct Current  the flow of electric charge is only in one direction.  This type of electricity is produced by batteries, static, and lightning.  In the circuit, the current flows at a specific, constant voltage.
  8. 8. Types of Current Alternating Current  the movement of electric charge periodically reverses direction.  This type of electricity is produced or generated by AC generators commonly from a hydro electric plant.  Delivered through a power transmission lines. AC current can be reduced through the use of power transformer to suite for its application.
  9. 9. Components of Circuit  Load - commonly represented by a bulb or any electrical component that consumes electricity.  Supply - Commonly represented by a cell or a battery  Switch - an electrical device that opens or closed a circuit.
  10. 10. A simple circuit
  11. 11. Types of Circuit  Open Circuit - a type of circuit that has an open path for current to flow. It means that current cannot flow in open circuit.  Closed Circuit - a type of circuit that has a closed path for current to flow. It means that current can flow in a closed circuit.
  12. 12. Components of Circuit  Load - commonly represented by a bulb or any electrical component that consumes electricity.  Supply - Commonly represented by a cell or a battery  Switch - an electrical device that opens or closed a circuit.
  13. 13. MODULE 4_ DIAGNOSE & TROUBLESHOOT COMPUTER SYSTEM (DT) LESSON 2_ DIAGNOSE & CONFIGURE COMPUTER SYSTEMS

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