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Phase difference in CR and LR circuits

  1. Jan 22, 2007 #1
    I have just done an experiment on CR and LR circuits.
    [​IMG]

    Connect channel 1 of the CRO across both the capacitor and resistor and channel 2 across the resistor.The trace on channel 1 is taken as the p.d. across the capacitor and that on channel 2 as ths current throught the capacitor.
    [​IMG]

    Replace the capacitor waith a high inductance coil fitted on a double C-core.

    I have some questions about this.

    1.Why is channel 1 is connected across both the capacitor and resistor and not only the capacitor?

    2.Why the trace on channel 2 gives the current through the capacitor?

    3.When we increased the resistance value, the phase difference decreased.Why?

    4.what is the phase difference between the p.d. and the current?

    5.Change the resistance value and observe how this affects the phase
    difference.Describle and explain the change,if any,in the phase difference.

    6.Replace the capacitor with a high inductance coil fitted on a double c-core.Observe the CRO traces and note the phase diff between the p.d. across the inductor and the current through it.What is the phase diff. between the p.d. and the current?Why is it not 90°? How to sketch the CRO traces?

    7.Change the resistance value and observe how this affects the phase difference.Describle and explain the change, if any, in the phase difference.

    I have so many question to ask ..:cry:
     
  2. jcsd
  3. Jan 22, 2007 #2
    I'm not going to do your homework for you. What, specifically, do you need help with?

    Phasers seem like the way to go with this type of problem, though since there isn't anything numerical you don't necessarily have to.
     
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