Why the capacitors works on ac only?

DWQA QuestionsCategory: Basic of Electrical EngineeringWhy the capacitors works on ac only?
human asked 7 years ago
3 Answers
Bushu answered 7 years ago

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

Yukti answered 7 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.

Nitesh answered 7 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.