Continue to Site

Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

Register Log in

Capacitors do not dissipate power

Status
Not open for further replies.
S

sadpony

Junior Member level 2
Junior Member level 2
Joined
Jul 14, 2013
Messages
22
Helped
0
Reputation
0
Reaction score
0
Trophy points
1
Activity points
227
"capacitors cannot dissipate power, even though current can flow through them. because the voltage and current are 90° out of phase". I read this in a book but couldn't understand its meaning. Can anyone explain it to me.
Thanks in advance
 

I always understood it as:

The power is V x I x cosine of the phase difference between V and I and since the cosine of 90° is zero, the power dissipated is zero.
 
Of course this is an idealization and only true of an "ideal
capacitor". Real ones have conduction losses in the plates
and dielectric losses in the insulator. And while the capacitor
(ideal) may not dissipate power, the current it imposes will
cause that power to be dissipated in the source.
 
Status
Not open for further replies.

Similar threads

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Back
Top