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T6B03
Which of these components can be used as an electronic switch?
Pick an answer to check it.
Answer: C. Transistor
A transistor can be used as an electronic switch. A small current or voltage at its control lead can turn a much larger current on or off. Varistors, potentiometers, and thermistors are kinds of resistors and are not used as switches this way.
Tip: Transistors switch and amplify.