Capacitors
Submitted by: Gabrielle Daniel
2/19/08
Sec 216
Lab partner: Barbara H.
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Introduction
Objective:
This experiment is focused on the charge and discharge of a capacitor. First, a
capacitor is a physical device that store electric charge and energy. Within this
experiment, we will be using an RC circuit that will display the differences in
effectiveness of capacitors by combining them into different arrangements such as series
and parallel.
Theory:
During this experiment, we will be comparing effectiveness of capacitor
combinations by comparing the capacitance, voltage, charge and energy measurements.
In order to measure the capacitance we will use the equation
Q=C’V’,
(1)
Where the capacitance is proportional to the product of the amount of charge stored on
the conducting plates of a capacitor, measured in Coulombs (C) and the potential
difference measured in Volts (V). Together, these units measure the capacitance in Farads
(F)
In addition to the equation above, we will also be using another equation to
measure the amount of energy stored in two capacitors of different capacitance in parallel
and series circuits. We will use the equation
E= (1/2) Q’V’,
(2)
where the energy (E), measured in micro joules (μJ) is derived from the equation,
E= (1/2) C’V²
(3)
both equations can be used to find the amount of energy stored in a charged capacitor. In
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