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Question

A small circular thing you push to activate a machine is ___?


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Solution

Switch:

  1. A switch is an external electrical component that activates a device.
  2. It is used in an electric circuit to allow current flow or stop the current flow.
  3. A transistor is used in a circuit as a switch.

Diagram:

Lights - connecting a close mounted fitting | Diy Fix It

Therefore, a small circular thing you push to activate a machine is a switch.


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