Day Twenty - Impedance 5/16/17

Hello guys, today we talked about impedance, which is the resistance in AC circuit.
The one special thing about impedance is the ability of making a phase shift.
For resistor, there will be no phase shift, but for capacitor and inductor, there will be phase shift due to its imaginary part impedance.


Here is an example of how we calculate the impedance of the capacitor and the alternating current going through it.

Pre-Lab:

For the circuit in the pre-lab for 5k Hz waveform, the calculated voltage and current for 47ohms plus 100ohms resistors is listed in one. The calculated voltage and current for 47ohms resistor and 0.001H inductor is listed in two. The calculated voltage and current for 47ohms resistor and 0.1microFarat capacitor is listed in three.

Lab:
For 5k Hz:

Our measured current is 13.27mA for 100ohms resistor and measure voltage is 1.367V.
There is no phase shift.

Our measured current is 34mA for the inductor and voltage is 1.06V.
There is a phase shift of 32.5 degree.

Our measured current is 6.2mA for the capacitor and voltage is 2.05V.
There is a phase shift of 82.8 degree.

Comparing the current and voltage:

Summary:
From our lab, we can conclude that there are phase shifts in circuits consisting of capacitor and inductor. Using the phasor analysis, we can precisely calculate the max current and max voltage in the given circuit element. It is important to note that the phase shift is also calculated, and it can be represented as the phase between voltage and current.