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What is a control test tube?

Updated: 8/11/2023
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Wiki User

14y ago

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There are many uses of the electromagnet, it is used to invent generators and electric motors, used it to control the switch relay, use in practical industries, and even in an electric bell etc. Because the electromagnet is a type of magnet in which the magnetic field is produced by the electric current.

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9y ago
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14y ago

The test tube with the materials in it that stays the same to be compared to experimental test tube.

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