Electrical Engineering › Section C · Series circuits › Topic C.3
The voltage divider rule and notation
A series string shares its voltage out in proportion to resistance, and one short rule tells you each share without finding the current first. Add a clear way to name voltages at points and between points, and you can read any schematic's voltage levels.
In this topic
- Voltage divides as resistance
- The voltage divider rule
- Worked example: three resistors on 9 V
- Worked example: scaling a battery for an ADC
- Choosing divider values
- Ground and reference
- Double and single subscripts
- Worked example: a split supply
- Reading levels as a map
- Common mistakes to avoid
- Key takeaways
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