Today We learned about capacitors and RC circuits, did a lab on capacitor voltage-current relations, and learned inductors and also did a lab on inductor voltage-current relations.
Above we did an example where we had to find the energy stored in each capacitor and the voltage across each of the capacitors.
Capacitor Voltage-current Relations Lab:
The objective of this lab is to measure the relationship between then voltage difference across a capacitor and the current passing through it in an RC circuit when applying different types of time-varying signals.
Above we predicted what the current graph as a function of time will look like at the specified voltage function graph drawn in black.
Above is a our circuit layout and we are measuring the voltage across the capacitor.
From our oscilloscope, the input voltage is the sine wave at 1kHz and 2V in blue and the current is shown in orange.
This is our measurement of a 100Hz triangular wave at 4V in blue and current in orange.
This is our measurement of a 2kHz triangular wave at 2V in blue and current in orange.
Based on our results, we see that the current across the capacitor is not the cosine wave we had predicted. Since the capacitor is not able to charge and discharge quickly, we see that result in the current graphs. We also see this same effect in the triangular voltage input but is more "square" shaped as predicted.
Above we do equivalent capacitance in a circuit that are like ohms laws but opposite.
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