SESKStuff Everyone Should Know
SESK: Stuff Everyone Should Know · sesk.info/ham-transistor-electronic-switch

Which component can be used as an electronic switch?

Transistor.

Start playing free

  1. Transistor ✔
  2. Varistor
  3. Potentiometer

Why: A transistor can control a larger current with a smaller signal, so it can act as an electronic switch. It can also amplify signals.

Huh, didn't know that: Digital circuits use huge numbers of transistors as switches.

The dad joke
Why did the transistor make a great light switch? It was always ready to turn on.
Like this card?
Play the game

References

Answer: Transistor. A transistor can control a larger current with a smaller signal, so it can act as an electronic switch. It can also amplify signals.

  1. NCVEC 2026-2030 Technician Question Pool, T6B03 ncvec.org/downloads/2026-2030%20Technician%20Pool%20and%20Syllabus%20Public%20Release%20Feb%2019%202026.pdf
    C. Transistor
    Checked 2026-10-09.

Think this answer is wrong? Tap "Challenge this answer" on the card in the game and tell us why.

Test yourself in the game

Ham RadioWhich component can consist of three semiconductor regions?Ham RadioWhat electronic component allows current to flow in only one direction?Ham RadioWhat are the names of the electrodes of a bipolar junction transistor?

That's stuff everyone should know.