How can a benchtop psu supply both voltage and current?
I thought only a voltage can motivate a current through a circuit. If thats true, and I know it is, then why is there a knob to adjust current on a power supply?
Some supplies, it looks like, can do 30v max and 5amps.
To me it seems as if the 5amps is a limiter, so that if the resistance through the circuit is low, then the 30v can't possibly push more than 5 amps.
I thought only a voltage can motivate a current through a circuit. If thats true, and I know it is, then why is there a knob to adjust current on a power supply?
Some supplies, it looks like, can do 30v max and 5amps.
To me it seems as if the 5amps is a limiter, so that if the resistance through the circuit is low, then the 30v can't possibly push more than 5 amps.