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A capacitor is rated to operate in a certain temperature range. It is not designed to operate as a variable temperature device.

The temperature of a capacitor depends primarily on the ambient operating temperature around it plus the frequency of operation (no of charge / discharge per second). Normal electrolytic capacitors used in consumer electronics are rated from 85 degrees Celsius to 105 degrees Celsius.

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Q: How do you vary the temperature of a capacitor?
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