5 Series RL Circuits
Thursday, 12 July 2018
8:11 AM
You will be provided with an inductor.
Series RL Circuits
Construct the series RL circuit shown in Figure LT2-5-1.
Figure LT2-5-1
Measure the quantities listed in Table LT2-5-1.
Note: Record all voltages in this section as peak-to-peak values.
Table LT2-5-1
Frequency
VR1
VL1
∠VR1
(w.r.t. VS)
∠VL1
(w.r.t. VS)
2 kHz
3.3 kHz
5.6 kHz
9.3 kHz
15.5 kHz
25.8 kHz
43.1 kHz
71.9 kHz
120 kHz
200 kHz
Graph both the voltage magnitude across the resistor (𝑣𝑅1) and the voltage magnitude across the inductor (𝑣𝐿1) as a function of frequency. Label each curve. Either use Plot LT2-5-1 or use Excel for your graph.
Note: The horizontal frequency axis is logarithmic to the base 10, i.e. log10𝑓
Plot LT2-5-1
Graph both the phase of the voltage across the resistor (𝑣𝑅1) and the phase of the voltage across the inductor (𝑣𝐿1), with respect to the source voltage (𝑣𝑆), as a function of frequency. Either use Plot LT2-5-2 or use Excel for your graph.
Note: The horizontal frequency axis is logarithmic to the base 10, i.e. log10𝑓
Plot LT2-5-2
Show Plot LT2-5-1 and Plot LT2-5-2 to a Lab Tutor and explain how the graphs were obtained.