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257-MP11 Intro rev 3

# 257-MP11 Intro rev 3 - MP11 RCL Circuits and resonance PHY...

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MP11 RCL Circuits and resonance PHY 257 In this lab we will complete the following tasks: a. In an AC RC circuit we will measure the phase difference φ between the current I and the voltage V C across C b. In an AC RL circuit we will measure the phase difference φ between the current I and the voltage V L across L c. In an AC RCL circuit we determine the resonant frequency f R for which the current I is maximum. From f R we will determine the inductance L d. We will add a ferromagnetic core inside the inductor and repeat part c . We will determine the new inductance L ' and from that the permeability μ of the core (page 1)

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Oscilloscope Section V-1: Ph diff b I d V Ch.1 Ch2. Phase difference φ between I and C Use the circuit shown in the figure f 1000 Hz R 6000 To Ch1: V R = 1000 Hz , = 6000 , C = 0.002 μ F Note: R Common Note: Channel 1 of the oscilloscope measures V R which is proportional to(and in h i h) I C phase with) . Channel 2 measures V C instead. We can invert Ch 2 by using the To Ch2: -V C can invert Ch 2 by using the “POSITION” knob. By pulling that knob out, you will invert the picture of Ch 2 and the scope will show V C in the proper phase wrt V R .
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257-MP11 Intro rev 3 - MP11 RCL Circuits and resonance PHY...

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