Capacitors, DC and AC Current

Capacitors, DC and AC Current

Category:

Science & Technology

Tags:

• Capacitors
• DC and AC Current

[san42c02y]

Thanks,i learnt something very important from this clip.

[AllAmericanFiveRadio]

Thanks san42c02y

[512147214]

hi brother ur presentation is very nice my concept has ben cleard......but brother tell me one thing......

why we use capacitor and inductor in an A.C and D.C circuits......>>>>>>>>>>>>>>>

plz give me concept abt these questions i ll b v thankfull 2 u??????????????????

[AllAmericanFiveRadio]

@512147214

There's not one answer. You can use a capacitor to isolate an AC signal riding on top of a DC bias voltage, this is very common. You can use capacitors to filter a DC power supplies. You can use capacitors to drain unwanted RF from a circuit. Inductors can be use for the same things but are configured in the circuit differently. Sometimes a capacitor works better, sometimes an inductor works better. It takes some study to understand why.

[mamu7mich]

can you please explain why does for ac in a capacitor the current leads the voltage?? i know about the graph but why is this so?

[AllAmericanFiveRadio]

@mamu7mich

In this simple circuit there is no lead with the current through the capacitor and the voltage across it on the first half cycle. When the voltage is first applied there is a large current flow and it diminishes as the capacitor charges. Now the cap is charged, and this energy in the cap can ad or deter current flow depending on the AC frequency and the capacitance of the cap. It take time to charge and to discharge a capacitor.

[hardstyle905]

@salimkhan007 Max discharge current is I = U/R

[512147214]

greaaaaattttttttttttttt explaination i hv becom ur fan i swear i accept u my teacher ;-) v nice

[512147214]

and y we need to use?????????????????

[TurKdiRty]

it would be nice to see the effect different frequencies have