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Voltage across capacitor gives a straight line

Discussion in 'Homework Help' started by hitmen, Sep 24, 2008.

  1. hitmen

    Thread Starter Active Member

    Sep 21, 2008
    The thumbnail below shows an experiment that I am supposed to do for my lab. Apparently the answers were not given so I am seeking help on this forum.

    A 4Volt peak to peak voltage is connected as shown in the diagram.

    When the waveform across the resistor was measured, only a decreasing straight line was displayed.

    The only hint given is that there is a small resistance across the osciloscope probes.

    Can anyone enlighten me on the answer? :confused:
    Last edited: Sep 24, 2008
  2. mik3

    Senior Member

    Feb 4, 2008
    Where is the diagram?
  3. hitmen

    Thread Starter Active Member

    Sep 21, 2008
    Diagram uploaded.
  4. liitlefan

    New Member

    Sep 24, 2008
    maybe you can change your osciloscope's time scale,what u see maybe just part of waveform.good luck~
  5. Ron H

    AAC Fanatic!

    Apr 14, 2005
    If the negative side of your generator is connected to earth ground (through the power cord), and your scope chassis is also connected to earth ground, you won't be able to measure the voltage across the resistor with a simple single-channel probe. You need either a differential probe, or to use both channels in A-B mode.