127-08 LR and LRC Circuits-1

127-08 LR and LRC Circuits-1 - PHYSICS 127 EXPERIMENT NO. 8...

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PHYSICS 127 EXPERIMENT NO. 8 LR AND LRC CIRCUITS In this experiment, we observe the transient behavior of series LR (inductance-resistance) and LRC (inductance-resistance-capacitance) circuits. A. Equipment 1 Oscilloscope, 1 Function Generator, 1 Inductance Coil, 1 Decade Resistance Box, 1 Decade Capacitance Box. B. Method In Part I, a square wave is applied to a series LR circuit. The period of the square wave is adjusted to be long compared with the time constant of the LR circuit and the exponential approach to steady state is observed. In Part II, a square wave is applied to a series LRC circuit and the damped oscillations are observed. C. Procedure I. L-R Circuit Connect the circuit as shown in Figure 1: Square Waves Oscilloscope Ch 1 Ch 2 Oscillator 1 kHz R Decade Resistor 1Ω coil L Figure 1. L-R Circuit. Set the function generator to produce 1000 Hz square waves of maximum amplitude. Adjust the decade resistor R to 100 . Adjust the oscilloscope for clear viewing conditions. Use the DC mode.
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Q1. Sketch the oscilloscope trace and explain what is happening at each point.
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This note was uploaded on 09/27/2009 for the course PHY 126 taught by Professor Staff during the Spring '08 term at SUNY Stony Brook.

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127-08 LR and LRC Circuits-1 - PHYSICS 127 EXPERIMENT NO. 8...

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