• Skip to primary navigation
  • Skip to main content
  • Skip to primary sidebar

How Engineering Works

  • Home
  • About Us
  • Electrical Engineering
    • Interview Questions
  • Privacy Policy
  • Disclaimer
  • Contact Us
  • Blog

Why the capacitors works on ac only?

October 10, 2017 by human

DWQA Questions › Category: Basic of Electrical Engineering › Why the capacitors works on ac only?
0 Vote Up Vote Down
human asked 5 years ago
3 Answers
0 Vote Up Vote Down
Bushu answered 5 years ago

Generally capacitor gives infinite resistance to dc components(i.e., block the dc components). it allows the ac components to pass through.

0 Vote Up Vote Down
Yukti answered 5 years ago

The reactance of capacitance is inversely proportional to frequency . For DC supply as frequency is zero ,the reactance of capacitance is infinity . so capacitance behave like a open circuit for DC supply.. So capacitance will work only for AC supply.

0 Vote Up Vote Down
Nitesh answered 5 years ago

Reactance of capacitor X = 1/(2πfc)

Since f=0, for dc frequency is zero.
So, Reactance X will be infinity for dc.

means capacitor blocks dc and allows only ac to pass.

Primary Sidebar

Related Questions

  • What is the importance of power factor? asked by admin
  • Battery banks are in connected in series or parallel and why? asked by admin
  • Why AC needs more insulation than DC at same voltage level? asked by
  • Why the power factor not more than unity? asked by admin

INTERVIEW QUESTIONS

MCQ or Objective





Recommended Post

MCQ on Basic Electrical

MCQs on Power Generation

MCQs on Transformer

MCQs on Electrical Circuit Theory – 4

MCQs on DC Motor

Categories

  • Electrical Articles (19)
  • Electrical MCQ (75)
  • Electrical Questions (11)
  • Interviews Questions (7)
  • IQ Test (1)
  • Uncategorized (10)

About Us | Privacy Policy | Disclaimer


Copyright@2017-2022