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i imagine you are referring to ON as a transistor is saturated or ON.

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14y ago
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6mo ago

A transistor can electronically switch the output by controlling the flow of current between its two terminals, called the collector and emitter. It has a third terminal, called the base, which acts as a control input. When a small current is applied to the base terminal, it influences the flow of current between the collector and emitter terminals, effectively turning the transistor "on" or "off" and allowing it to change the output state.

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Q: How does a transistor electronically switch the output on?
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