PHY 201 - Lab04 - Cap

# PHY 201 - Lab04 - Cap - II Introduction . .This

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II. Introduction This laboratory objective is to investigate the physical and electrical  characteristics of a capacitor. We will determine this by measuring the voltage  from the capacitor as the distance between two  dielectric  plates increase. This  lab will also identify the relationship between capacitor and voltage under parallel  and series connection. We will determine this by measuring the voltage under  different capacitor combination such as in series and in parallel connection. III. Theory and Method of Investigation A capacitor is an energy storage device. It is made up of two conductors separated by an insulator such as dielectric plates. The charge is deposited on one of two parallel plates and will remain there. When there is potential different across the conductors, it will establishes an electric field. Then, the electric field can produces a mechanical force which, as an energy source, can do work on other electric charges. The term capacitance is the ability of a capacitor to store charge. It is measured in Farads. The electrical charge per potential difference defines capacitance as C=Q/V. The charge that can be stored within a capacitor are depend on the physical construction of the capacitor like area of the plates, the separation distance of the plates, and the material between the plates, called the dielectric. These properties describe a capacitor’s charge capacity according to the following relation: There are different characteristics of capacitor under different combination. For example: The capacitor in parallel connection has following characteristics

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The voltage across them are the same 2. The total charge on the capacitors is the sum of the charge on each capacitor 3. The total capacitance of the parallel capacitor circuit is the sum of the individual capacitances. The capacitor in series connection has following characteristics 1. The voltage applied across capacitors in series is the sum of the voltages across each. 2. The total charge on the capacitors is the same for each capacitor. 3. The inverse of the total capacitance is the sum of the inverse of the individual capacitances. Lad procedure: Part 1 1. Determine the parasitic capacitance of the Electrometer a. Take a known value capacitor of approximately 100 picofards. b. Set the Power Supply voltage to approximately 25 Volts and connect the capacitor to the power supply. c. Remove the charged capacitor from the power supply and connect it across the terminals of the Electrometer. d.
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PHY 201 - Lab04 - Cap - II Introduction . .This

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