> You CAN manipulate current directly, but of course it effects the voltage
> and/or the resistance according to Ohm's law.
>
> Example 1:  Set your bench supply to deliver 100 mA through a 100 ohm
> resistor.  Measure the voltage across the resistor and behold!  V = IR = 10
> volts.

I understand that you manipulate it in the sense that you
turn the "current knob" to the desired setting, but what
is really happening inside?  Isn't it just adjusting the
voltage (and perhaps resistance?) to get to the desired
current?  If that is true, then current is not really
being manipulated - it is just a by-product of the V/R
combo.

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