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Created page with "==Key Stage 4== ===Meaning=== right|300px|thumb|The symbol for a '''variable power supply'''. A '''variable power supply''' is a source..."
==Key Stage 4==
===Meaning===
[[File:VariablePowerSupplySymbol.png|right|300px|thumb|The symbol for a '''variable power supply'''.]]
A '''variable power supply''' is a source of [[Electrical Current|electrical current]] which can have the [[Potential Difference|potential difference]] changed.
===About Variable Power Supplies===
: '''Variable power supplies''' can be made with any power supply connected in [[Series Circuit|series]] to a [[Variable Resistor|variable resistor]].
: A '''variable power supply''' can also be made with [[Electrical Switch|switches]] which connect extra power supplies in series.
===Meaning===
[[File:VariablePowerSupplySymbol.png|right|300px|thumb|The symbol for a '''variable power supply'''.]]
A '''variable power supply''' is a source of [[Electrical Current|electrical current]] which can have the [[Potential Difference|potential difference]] changed.
===About Variable Power Supplies===
: '''Variable power supplies''' can be made with any power supply connected in [[Series Circuit|series]] to a [[Variable Resistor|variable resistor]].
: A '''variable power supply''' can also be made with [[Electrical Switch|switches]] which connect extra power supplies in series.