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Because metallic substances are good converters of heat thus the liquid gets heated quickly.
Immersion rods are made up of metallic substances because metals are good conductors of heat . And so they can conduct heat through them to the liquids.
Because metallic substances conduct heat very efficiently.

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11y ago
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11y ago

they are used where there is a big change of temperature, because they have a very low coefficient of thermal expansion, so their dimensions dont change.

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Anonymous

Lvl 1
3y ago
Please provide a citation that Invar is used in an Immersion heater. The thremostat brass tube which expands and contracts more than the thin steel rod down the middle could possibly work even if the rod was plain steel.

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8y ago

Metals are unbreakable and good conductors of heat.

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Q: Why is an invar rod used in an immersion heater?
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