Re: [Phys-l] energy to charge a capacitor and stored energy

[Joseph Bellina <jbellina@saintmarys.edu>]

Once the electron leaves one plate, that plate will carry a positive  
charge and so the electron will move against the field, and work will  
have to be done.

joe

Joseph J. Bellina, Jr. Ph.D.
Professor of Physics
Saint Mary's College
Notre Dame, IN 46556

On Aug 23, 2008, at 12:07 PM, sridhar chitta wrote:

> Hi Curtis
> One comment:
> I assume that the 1.602x10(-19) C is the smallest charge possible  
> and will
> be the only one required to be moved and since there will be no  
> opposition
> by the capacitor plates there will not be energy expended by the  
> battery.
> Is this right ?
> Regards
> Sridhar
>
> On Sat, Aug 23, 2008 at 8:37 PM, curtis osterhoudt  
> <flutzpah@yahoo.com>wrote:
>
> > Judging from the way the question was asked, a very quick answer  
> > is here:
> > http://hyperphysics.phy-astr.gsu.edu/hbase/electric/capeng.html .
> >  However, note that if you want to bring in dynamical effects, the  
> > strict
> > answer depends on how *quickly* the charging happens, and whether  
> > any energy
> > is allowed to be dissipated through radiation to the far field  
> > (for example,
> > from currents changing in the wires connecting the battery and the
> > capacitor), whether the capacitor is filled with an "ideal"  
> > dielectric or
> > something which exhibits hysteresis, and so forth.
> >
> >     Regards,
> >                 C.O.
> >
> >  /************************************
> > Down with categorical imperative!
> > flutzpah@yahoo.com
> > ************************************/
> >
> >
> >
> > ----- Original Message ----
> > From: sridhar chitta <sridhar10chitta@gmail.com>
> > To: phys-l@carnot.physics.buffalo.edu
> > Sent: Saturday, August 23, 2008 7:46:26 AM
> > Subject: [Phys-l] energy to charge a capacitor and stored energy
> >
> > I use a 1V battery to charge a capacitor of capacity  
> > 1.602x10raised to -19
> > Farad (1.602x10raised to -19 coulomb is the electric charge of a  
> > single
> > electron).
> > What is the energy spent by the battery and the energy stored in the
> > capacitor ?
> >
> > P.S. If you receive spam mail from my mail id, please report to  
> > me. Thanks
> > Sridhar Chitta
> > _______________________________________________
> > Forum for Physics Educators
> > Phys-l@carnot.physics.buffalo.edu
> > https://carnot.physics.buffalo.edu/mailman/listinfo/phys-l
> >
> >
> >
> >
> > _______________________________________________
> > Forum for Physics Educators
> > Phys-l@carnot.physics.buffalo.edu
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>
>
>
> --
> "Students need to become intentional architects of their own learning,
> actively setting goals, exploring, reflecting, and integrating  
> acquired
> knowledge and experiences into existing worldviews"-----
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> Expectations (AAC&U 2002)
> ---------------------------------------------------------------------- 
> --------------------
> P.S. If you receive spam mail from my mail id, please report to me.  
> Thanks
> Sridhar Chitta
> _______________________________________________
> Forum for Physics Educators
> Phys-l@carnot.physics.buffalo.edu
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