The purpose of this lab was to gain an understanding of the effect a capacitor has on the change in voltage of a circuit. Capacitors store energy in an electric field, and are used to prevent voltage from instantaneously changing along a wire. In this lab, we will build a simple LC circuit in order to observe how the voltage is affected with a capacitor in the circuit.
For the pre-lab, we determined the voltage-current relationship of an LC circuit with a sinusoidal voltage input, and a triangle wave input.
We used the waveform output to feed the circuit a 1 kHz and 2 kHz sinusoidal wave, as well as a 100 Hz triangular wave. We used the oscilloscope built into the WaveForms program in order to see the voltage input versus the voltage across the capacitor.
2 kHz sinusoidal wave
1 kHz sinusoidal wave
100 Hz triangular wave
In Class Examples
1. Obtain the energy stored in each capacitor shown below under DC conditions.
2. Find the equivalent capacitance for the collection of capacitors shown:
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