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Electricity can be generated directly from a candle in two ways:

  • A candle can generate enough light for an up close photovoltaic cell to generate a small amount of electricity. Several of them in series or parallel around the same candle will generate more electricity (volts or amperes). Many photovoltaic cells are combined together as solar cells to generate electricity from sunlight.
  • A candle can generate enough heat for a thermocouple to generate a small amount of electricity. Several of them in series or parallel around the same candle will generate more electricity (volts or amperes).

The flame could heat up water, which could turn into steam, the steam could turn a generator.

you cannot actually do it unless you use a flame which is a lot bigger and a far more powerful generator.

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8y ago

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