Ask Experts Questions for FREE Help !
Ask
    Cho's Avatar
    Cho Posts: 85, Reputation: 2
    Junior Member
    		  
    #1

    Aug 12, 2008, 08:26 AM
    How will a capacitor discharge?
    Suppose an input voltage changes from 0 to V volts during which a capacitor gets charged fully.Now if the potential is kept constant will the capacitor start discharging or will the charge inside the capacitor remain constant?
    ebaines's Avatar
    ebaines Posts: 12,131, Reputation: 1307
    Expert
    		  
    #2

    Aug 13, 2008, 09:16 AM
    Remember that the current through a capacitor is a function of the rate of change of voltage across it:



    You can see that if you keep the voltage constant, current flow is 0.
    Cho's Avatar
    Cho Posts: 85, Reputation: 2
    Junior Member
    		  
    #3

    Aug 14, 2008, 07:22 PM
    Even if a resistor is connected to it??
    ebaines's Avatar
    ebaines Posts: 12,131, Reputation: 1307
    Expert
    		  
    #4

    Aug 15, 2008, 05:39 AM
    Quote Originally Posted by Cho
    even if a resistor is connected to it???
    Yep, as long as the voltage across the cap is constant. If that resistor is in parallel with the capacitor you'll get current through the resistor (I = V/R), but not through the capacitor. If the resistor is in series with the cap then there's no current flow - unless the voltage is made to vary.
Not your question? Ask your question View similar questions
 

Question Tools Search this Question
Search this Question:

Advanced Search

Add your answer here.


Check out some similar questions!

Start capacitor/ run capacitor info [ 3 Answers ]

OK I think I have narrowed my problem down to either a run capacitor or my start capacitor My fan on top of my unit runs but the compressor will hum for about 3-5 seconds every 5 minutes or so . Is it possible for my duel run capacitor to let the fan run but not let the compressor run, or is...

Dishonorable discharge vs. Bad conduct discharge [ 6 Answers ]

I am currently waiting a court marial and right now if I plea out the offer is 33 months with a BCD. I could get a lower sentence if I take the DD, is it worth it? I still have to register as a sex offender when I get out. If anyone has any info or knows anyone with a similar case, it would gladly...

Clear stringy discharge over yellow discharge is that the mucus plug [ 13 Answers ]

Okay so when I go the bathroom and I wipe there is a yellow discharge and a clear stringy discharge over it. What does a mucus plug look like? There is no red or pink discharge with it. PS I am 36 weeks pregnant and baby has dropped.

A/C Capacitor [ 1 Answers ]

I would like to know what would cause the capacitor to burn up on my A/C unit?

View more questions Search