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How should we understand control the voltage, not the current ?

  1. Feb 2, 2012 #1
    How should we understand "control the voltage, not the current"?

    And provide "roundabout" for spikes? I mean seriously, isn't V and A closely related? You regulate one, you end up regulate both?
     
  2. jcsd
  3. Feb 2, 2012 #2
    Re: How should we understand "control the voltage, not the current"?

    No, when you regulate the voltage you end up with constant voltage not the current.
    Simply ohms law I = V/R
    Despite the fact that we have a voltage which does not change, but the load current will change as load resistance is changing.
    For V=10 and load resistance change from 1K to 100R causes the change in load current from 100mA to 10mA. Despite the fact that the voltage doesn't change at all.
     
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