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

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Solution

Switch:
A switch is an external electrical component that activates a device.
It is used in an electric circuit to allow current flow or stop the current flow.
A transistor is used in a circuit as a switch.
Diagram:
Therefore, a small circular thing you push to activate a machine is a switch.

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

Switch:A switch is an external electrical component that activates a device.It is used in an electric circuit to allow current flow or stop the current flow.A transistor is used in a circuit as a switch.Diagram:Therefore, a small circular thing you push to activate a machine is a switch.

Switch:
A switch is an external electrical component that activates a device.
It is used in an electric circuit to allow current flow or stop the current flow.
A transistor is used in a circuit as a switch.
Diagram:
Therefore, a small circular thing you push to activate a machine is a switch.