Exp-1 Impedance Measurement.pdf

Exp-1 Impedance Measurement.pdf - Middle East Technical...

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Middle East Technical University - NCC EEE202 - Circuits Theory II Laboratory 1 EEE 202 EXPERIMENT #1 IMPEDANCE MEASUREMENT Abstract Impedance measurement methods are introduced and impedances of several electrical components are measured. Preliminary Work 1. Consider the voltage divider circuit in Figure 1. Propose a method to find the I-V characteristics of a resistive element R using the given circuit configuration and oscilloscope. Decide on the probe connections and mode of operation. Figure 1 2. Consider the circuit of Figure 2. One voltmeter and ammeter is used in the circuit, and note that those measurement tools always measures RMS value of the signal. Find capacitance of the capacitor C in terms of the measured current and voltage values and the angular frequency w . + A R s + v in (t) = V i sin(wt) V C Figure 2 i 1 K i + R V - v in (t) = V i sin(wt)
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Middle East Technical University - NCC EEE202 - Circuits Theory II Laboratory 2 Information on Wheatstone bridge circuit: The Wheatstone bridge circuit shown in Figure 3 is used to measure an unknown resistance R. a i 1 i 2 R 1 R 2 v in (t) b D c I i D i 3 R R 3 d Figure 3 The detector D , used to check whether the bridge is balanced, can be an ammeter, a voltmeter or a scope. When the bridge is balanced, the detector current i D
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  • Spring '11
  • 1
  • Impedance, Voltage divider, Electrical impedance, East Technical University, Middle East Technical, Circuits Theory II Laboratory

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