EE 212L: Impedance and AC Power
Objective: The purpose of this lab is to experimentally determine the impedance, average power consumed, and reactive power consumed by series RL and RC circuits.
Pre-lab: Consider the series RL and RC circuits shown in Figures 1 and 2, respectively, below.
- Given the series RL circuit shown in Figure 1 below, find
- (complex) impedance Z in rectangular form and polar form for the series combination of resistor and inductor; and
- average power P and reactive power Q absorbed by the series combination of resistor and inductor.
- Given the series RC circuit shown in Figure 2 below, find
- (complex) impedance Z in rectangular form and polar form for the series combination of resistor and capacitor; and
- average power P and reactive power Q absorbed by the series combination of resistor and capacitor.
Laboratory Procedure:
- Construct the circuit shown in Figure 1 on your breadboard.
Figure 1: Series RL circuit (R = 510 Ω; L = 0.47 mH; 2 V peak, 100 kHz sinusoidal source)
Use the oscilloscope to measure the following:- amplitude of voltage across the series combination of R and L,
- amplitude of current through the series combination of R and L, and
- time and phase difference between the voltage across and current through the series combination of R and L.
- Construct the circuit shown in Figure 2 on your breadboard.
Figure 2: Series RC circuit (R = 510 Ω; C = 4.7 nF; 2 V peak, 100 kHz sinusoidal source
Use the oscilloscope to measure the following:- amplitude of voltage across the series combination of R and C,
- amplitude of current through the series combination of R and C, and
- time and phase difference between the voltage across and current through the series combination of R and C.
Revised FEB2015