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In a series circuit, which quantity is the same through every resistor?

Series circuits share one current everywhere.

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  1. Voltage
  2. Resistance
  3. Current ✔

Why: There is only one path, so every charge that goes through the first resistor must go through the next. The voltage splits up, but the current does not.

Huh, didn't know that: Resistances in series simply add up, so every extra resistor in the chain lowers the current.

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Why did the fairy lights break up? They could not handle the series commitment.
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References

Answer: Current. There is only one path, so every charge that goes through the first resistor must go through the next. The voltage splits up, but the current does not.

  1. OpenStax College Physics 2e, 21.1 Resistors in Series and Parallel openstax.org/books/college-physics-2e/pages/21-1-resistors-in-series-and-parallel
    The same current flows through each resistor in series.
    Checked 2026-10-10.

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