This preview shows pages 1–4. Sign up to view the full content.
This preview has intentionally blurred sections. Sign up to view the full version.
View Full DocumentThis preview has intentionally blurred sections. Sign up to view the full version.
View Full Document
Unformatted text preview: New Era University College of Engineering and Technology Department of Electronics and Communications Engineering EE 371 Electrical Circuit 2 Laboratory M 1:00pm4:00pm Experiment No. 8 I M PEDANCE OF A SER IES RLC CIRCU I T Ariola, Crisvan Jimbert A. Rating: 3 nd year / BS EE D.O.P.: August 22, 2011 Group I.A D.O.S.: Arnel Ancheta Asst. Leader Engr. Reynaldo M. Dela Cruz Instructor Roland Alim Leader I. OBJECTIVES To verify experimentally the impedance of Z of a series RLC circuit is = + ( ) Z R2 XL XC 2 I I. EQUIPMENTS A. Power Supplies: 1. Isolation Transformer 2. Variablevoltage autotransformer (Variac of equivalent) B. I nstruments: 1. EVM or DMM C. Resistors: 1. 1 pc. 4700 , ½W, 5% Ω D. Capacitors: 1. 1 pc. 0.5 μF E . I nductor: 1. 1pc. Large ironcore choke, 8 or 9 H F. M iscellaneous 1. SPST switch 2. Polarized line cord with onoff switch and fuse I I I. PROCEDURE 1. With the line cord unplugged, line switch off , and S 1 open , connect the circuit. Set the autotransformer to its lowest output voltage. 2. Plug in the line cord; line switch on ; close S 1 . Increase the output voltage of the autotransformer until V AB = 10 V rms. Maintain this voltage throughout the experiment. Check it from time to time and adjust if necessary. 3. Measure the voltage across the resistor V R and the inductor , V L . Record the values in the table provided for the RL circuit. Open S 1 . 4. Calculate the current in the circuit using the measured value of V R and the rated value of R . Record your answer in the table for RL circuit. 5. using the calculated value of I and the measured value of V L , calculate X L . Record your answer in the “ RL” row of the table. 6. Calculate the total impedance of the circuit by two methods: Ohm’s law (using the calculated value of I and the applied voltage V AB ) and the squareroot formula (using R and X L ). Record your answers in the “ RL ” row of the table. 7. With S 1 open , add a 0.5µF capacitor in series with the resistor and choke as in the circuit diagram. 8. Close S 1 . Check to see that V AB = 10 V. Measure the voltage across the resistor V R , the choke V L , and the capacitor V C . Record the values in the “ RLC ” row of table. After taking all measurements, open S 1 ....
View
Full
Document
This note was uploaded on 09/18/2011 for the course ECON 101 taught by Professor Cruz during the Spring '11 term at Polytechnic University of Puerto Rico.
 Spring '11
 cruz

Click to edit the document details