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Series Resistors

Three resistors in a line add up — same current everywhere, voltages that sum to the supply.

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series-resistors.circuit dc analysis
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How it works

Resistors in series carry the same current, and their resistances add: Rtotal = 1k + 2k + 3k = 6 kΩ. Across 12 V that gives a loop current of 2 mA.

Each resistor drops a share of the supply in proportion to its value: 2 V, 4 V and 6 V. Run the analysis and confirm the node voltages step down along the chain.