Final answer:
The switch which changes states when actuated but reverts back to its initial state when the actuation is removed is called a momentary switch. This switch is typically connected in series with the device it controls, and its resistance is nearly zero when closed and exceptionally high when open, influencing whether the current passes through or not.
Step-by-step explanation:
A switch that changes states when actuated but returns to its initial state when actuated is withdrawn is called a momentary switch. These switches are commonly found in computer keyboards, control buttons, and power tools. They function depending on the actuation force. Once the force is removed, they quickly return to their initial state.
A switch typically has a variable resistance that is practically zero when closed and exceptionally high when open. It is arranged in a series with the device it controls. Therefore, when a switch is closed, it allows the current to pass, which means the device will operate. On the other hand, when the switch is open, the current cannot pass; therefore, the device won't operate.
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