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