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LAb 2

This document summarizes an experiment on an AC RL circuit. The objectives are to understand the characteristics of an RL series network and concepts like inductive reactance, impedance, and phase angle. Key results include calculating values like total impedance, current, voltages across R and L, and plotting a vector diagram. Measurements of voltages across R and L matched calculations. The conclusion restates that inductive reactance depends on frequency and defines the quality factor Q.

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114 views4 pages

LAb 2

This document summarizes an experiment on an AC RL circuit. The objectives are to understand the characteristics of an RL series network and concepts like inductive reactance, impedance, and phase angle. Key results include calculating values like total impedance, current, voltages across R and L, and plotting a vector diagram. Measurements of voltages across R and L matched calculations. The conclusion restates that inductive reactance depends on frequency and defines the quality factor Q.

Uploaded by

June del Mundo
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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Download as PDF, TXT or read online on Scribd
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ELECTRICAL CIRCUITS II

SCHEDULE: THURSDAY 7:00-10:00

ENGR. ARIEL E. ABAY


INSTRUCTOR

LABORATORY REPORT
EXPERIMENT 2 AC RL CIRCUIT

BSEE 2Ax

Group 1
BERNALDEZ, MARK GABRIEL S

CAPUYAN, PRINCESS AMOR

CUMALING, ARTH DAVE T

FELICIANO, ANGELA A

JARDENICO, DAN REYMOND P


Experiment 3-2 AC RL Circuit

OBJECTIVE

1. To understand the characteristics of an RL series network in ac circuit.


2. To understand the inductive reactance, impedance, and phase angle.

DISCUSSION

When an ac voltage is applied across a pure inductance, the current lags the voltage
90°.Inductance therefore has a phase angle associated with it.The opposition that an inductance
offers to the flow of alternating current is called inductive reactance and may be expressed as

XL∠90°, or jXL. The magnitude of XL is XL=2πfL=ωL.


An RL series circuit with an ac supply voltage is shown in Fig. 3-2-1.The impedance of this
circuit can be expressed as

ZT = Z1 + Z2 = R∠0° + XL∠+90°

The current in the circuit is

I=E/ZT (the current lags the voltage)

The voltage across R is


VR = I R

The voltage across L is


VL=I XL

By Kirchhoff's voltage law,then

ΣV = E - VR -VL = 0

or E=VR + VI
EQUIPMENT REQUIRED
1. KL-22001 Basic Electrical/Electronic Circuit Lab
2. KL-24002 Basic Electricity Experiments Module
3. Multimeter

PROCEDURE
1. Set the KL-24002 Module on the KL-22001 Basic Electrical/Electronic Circuit Lab,and
locate block f.
2. Complete the connections by referring to the circuit in Fig. 3-2-1 and the wiring diagram in
Fig. 3-2-2. Place the 0.5H inductor in the L1 position.Apply 9VAC from the AC Source on
KL-22001 Lab to EA.
Measure and record EA. EA = 9.4 V

3. Calculate and record the following values. (L1=0.5H, R9=1K)(L1=0.5H,R9=1K)

Reactance of L1 XL = 60𝛑 ≅ 188 .496 Ω


Total impedance Ω ZT ≅ 1017. 610 Ω ∠10.675°

Current in circuit mA I ≅ 8.844 mA ∠-10.675°


Voltage across R9 V ER ≅ 8.844 V ∠-10.675°
Voltage across L1EL=V EL ≅ 1.667 V∠79.325°
Quality factor Q=XL/R = 0.188
Phase angle θ = 10.675°
Power dissipated P = 78. 221 mW
4. Measure and record the values of ER and Ec by using the AC voltmeter.
Voltage across R9 ER= 5.9 V
Voltage across L1 EL= 3.5 V
Do the measured values equal the calculated values of step 3?
Yes

5. Using the equation EA =ER+EL , calculate the applied voltage of the circuit.
EA= 9.49V
Does the calculated value equal the measured value of step 2?
Yes
If not, explain it.

6. Using the values of R, XL and ZT, plot a vector diagram in space below.

XL

Θ= 10. 675 ZT

CONCLUSION

You have completed this experiment for the RL series circuit. The inductive reactance of an
inductor is proportional to frequency. The result of XL is a value for the frequency of 60 Hz.
The quality factor Q of an RL circuit is the ratio of XL to R; that is, Q=XL/R.

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