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If a heating element with a nominal value of voltage (V) and power (W) is fed with a different voltage, does the power vary linearly?

April 26, 2017different element fed heating nominal power v value voltage

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If a heating element with a nominal value of voltage (V) and power (W) is fed with a different voltage, does the power vary linearly?

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No, the power variation corresponds to the root of the ratio between the applied and the nominal voltage. Example: when a heating element with an input voltage of 220V and 100W is fed with 240V, its power will be 119 W.