ASVAB · Components and Devices

What does a diode do?

Correct answer

Allows current to flow in only one direction

  1. A Allows current to flow in only one direction
  2. B Measures resistance
  3. C Amplifies signals
  4. D Stores charge

Why this is the answer

A diode is a semiconductor device that allows current to flow in one direction only — it acts as a one-way valve for electrical current.
Source: ASVAB EI, Diodes

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About this topic: Components and Devices

Components and devices questions cover what resistors, capacitors, inductors, diodes, transistors, transformers, fuses and switches do, and their schematic symbols. Recognising a symbol and naming its job is most of the section. This is one of 19 Electronics Information questions on components and devices, each with a full explanation on a single study page.

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