User:Wrouse/Electrical Principles/Electrical fields

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On completion of this unit, and as a result of instruction and practical activities, the candidate should be able to:
  1. State that the function of a capacitor is to store a small amount of electrical energy in an electric field set up between its plates
  2. State that capacitance is measured in Farads(F) and explain the use of sub units. Sub units: mF, μF, nF and pF
  3. State the types of capacitor in general use in electronics. Types of capacitor: silvered mica, polyester, polystyrene, mylar, tantalum and electrolytic
  4. Explain the need for observing the correct voltage polarity when connecting electrolytic capacitors
  5. Describe the system of numerical coding used to identify the capacitance and tolerance of capacitors
  6. Identify series and parallel connections of capacitors and for each connection state the formula for the equivalent capacitance of the combination
  7. Draw the internationally accepted circuit symbols for types of capacitors.Capacitors: non-polarised, electrolytic, variable, pre-set
  8. Define electric field strength, electric flux, electric flux density, permittivity of free space, relative permittivity, capacitance
  9. Calculate the capacitance of a parallel-plate capacitor
  10. Sketch the electric field in a di-electric between charge surfaces of a parallel-plate capacitor
  11. Solve problems on electric fields including calculations based on the formulae for energy stored in a capacitor