there will be no current without a potentiol difference,is there an existence of a current source?
2007-09-04 22:05:55 · 3 answers · asked by Anonymous in Science & Mathematics ➔ Physics
There can be current without a potential difference when you're dealing with superconductors. It does require a potential difference to establish a current flow, due to the inductance of the circuit, but once established the flow can continue forever without a voltage source.
You may be referring to a "constant current" source. This is an electronic circuit that regulates its output to provide a constant current into any load resistance, from 0 ohms up to some limit which requires the maximum voltage the circuit can provide. Since any resistive load follows Ohm's law, there certainly must be a potential difference for current to flow in the load.
2007-09-05 01:50:11 · answer #1 · answered by kirchwey 7 · 0⤊ 0⤋
That which causes a difference in potential, provides a source for current.
A water pump is rated both in the pressure it can develop as well as the amount of water it can move. A battery is likewise.
2007-09-05 05:26:26 · answer #2 · answered by koyaanisqats1 3 · 0⤊ 0⤋
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2014-11-15 04:18:57 · answer #3 · answered by Anonymous · 0⤊ 0⤋