expi6 - New Era University...

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New Era University College of Engineering and Technology  EE 371 Electrical Circuit 2 Laboratory M 1:00pm-4:00pm Experiment No. 6 VOLTAGE RELATIONSHIPS IN A SERIES RC CIRCUIT Ariola, Crisvan Jimbert A. Rating: 3 nd year / BS EE D.O.P.: August 22, 2011 Group I.A D.O.S.: September 11, 2011 Arnel Ancheta Asst. Leader Engr. Reynaldo M. Dela Cruz Instructor Roland Alim Leader I. OBJECTIVES
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1. To measure the phase angle between the applied voltage V and ө the current I in a series RC circuit. 2. To verify experimentally that the relationships among the applied voltage V, the voltage V R across R L and the voltage V c across C are described by the formulas V = √v 2 R + V 2 c V R = V x R/Z V C = V x X c /Z II. EQUIPMENTS A. Power Supplies: 1. Isolation Transformer 2. Variable-voltage autotransformer B. Instruments: 1. Dual trace Oscilloscope 2. EVM or DMM C. Resistors: 1. 1 pc 5600 ohms 2. 1 pc 1200 ohms, D. Capacitors: 1. 1 pc. 0.5 µF E. Miscellaneous: 1. SPST switch 2. Polarized line cord with on-off switch and fuse III. PROCEDURE 1. Using an Ohmmeter, measure the resistance of the 5600-Ω and 12,000-Ω resisitors. Record the values in table provided. 2. With the line cord unplugged, line switch off, and S 1 OPEN, connect the circuit of figure 6- 3 . The oscilloscope should be turned off and the autotransformer should be set at its lowest output voltage. Channel 1 and Channel 2 input jacks should be connected as shown. The EXT TRIG jack should be connected to the capacitor as shown. Set the trigger switch to EXT. 3. Plug in the line cord, turn the light switch ON and CLOSE S 1.
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4. Channel 1 is the voltage reference channel. Turn ON the oscilloscope. Adjust the controls of the scope so that a single sine wave, about 6 divisions peak-to-peak, fills the width of the screen. Use the horizontal and vertical controls to center the waveform on the screen. 5. Switch to channel 2. This is the current channel. Adjust the controls so that a single sine wave, about 4 division’s peak-to-peak, fills the width of the screen. Use the vertical control to center the waveform vertically. Do not use the horizontal control. 6.
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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.

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expi6 - New Era University...

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