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photo a gate can keep you out or let you into a field in the same way a microscopic logic gate is a barrier in an electronic circuit that can let electricity through or stop it flowing altogether put lots of logic gates together and you make a machine that s capable of basic mathematical reasoning
Electrons are pulled from the emitter into the baseâand then from the base into the collector. And the transistor switches to its on state: The small current that we turn on at the base makes a big current flow between the emitter and the collector.By turning a small input current into a large output current, the transistor acts like an amplifier.But it also acts like a switch at the same time. transistor works when the electrons and the holes start moving across the two junctions between the n-type and p-type silicon. Let's connect the transistor up to some power. Suppose we attach a small positive voltage to the base, make the emitter negatively charged, and make the collector positively charged.