H12-411: HCIA-Data Center FacilityDemo

By Huawei · Question Mode

QuestionQ7

Cloud Computing Basics

Which of the following statements regarding direct current are true?

Choose three
  • A The direction of direct current does not change periodically with time.
  • B It is easier to extinguish direct current arcs than alternating current arcs.
  • C The value of direct current is constant.
  • D Electronic devices are suitable for direct current power supply.
Explanation

Direct current flows in one direction and, in its conventional steady form, has a constant value. Most electronic equipment requires a steady DC supply. DC arcs are generally harder—not easier—to extinguish than AC arcs because AC periodically crosses zero current, which assists interruption.

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