Multiple choice general knowledge science & technology

The simplest digital sensor is a:

  1. relay

  2. switch

  3. a/c generator

  4. solenoid
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

A switch is the simplest digital sensor because it has only two states: open (off/0) or closed (on/1). This binary output makes switches fundamental digital sensors that detect presence, position, or pressure without complex circuitry.

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