BRAINCAKEInvestigating the Characteristics of Components
To measure the variation of current with potential difference for a component, either a potential divider circuit or a variable resistor can be used to vary the current from a maximum to a minimum.
The advantage of using a potential divider is the current through the component can be reduced to zero.
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Key terms in this lesson
- Potential difference
- The energy transferred per unit charge as charge moves between two points in a circuit.
- Potential divider
- A circuit of two or more resistors in series connected across a source of fixed potential difference, used to produce a smaller, fixed or variable, output p.d.
More in Electric Current
- Ohm's Law
- Resistivity
- Superconductivity
- Electronic Components
- IV Graphs
- Fixed Resistors
- Filament Lamp
- Thermistors and Light Dependent Resistors
All 20 lessons in Electric Current · All AQA AS-level Physics topics