# More batteries, brighter bulb

Associate the brightness of a lamp or volume of a buzzer with the number and voltage of cells used in a series circuit

Builds on: How switches work (hard, https://ai.page/c/how-switches-work/en.md), Circuit vocabulary (hard, https://ai.page/c/circuit-vocabulary/en.md), How energy travels around (soft, https://ai.page/c/how-energy-travels-around/en.md)

Concept id: more-batteries-brighter-bulb. Subject: science. Licence: CC BY-SA 4.0.

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