Re: capacitances in parallel

On Wed, 03 Jan 2007 13:20:26 -0800, John Larkin
<jjlarkin@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx> wrote:

On Wed, 03 Jan 2007 01:43:14 -0800, John Fields
<jfields@xxxxxxxxxxxxxxxxxxxxx> wrote:

On Tue, 02 Jan 2007 22:47:26 -0800, John Larkin
<jjlarkin@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx> wrote:

On Wed, 3 Jan 2007 16:36:53 +1100, "Phil Allison"
<philallison@xxxxxxxxxx> wrote:


"Robotnik"


I am not concerned about the equation side. I am concerned about how
the capacitances in parallel in add up. For comparison I shall say, the
value of two resistances in series is the sum of te two resistance
since the voltage supplied to the resistors will distribute itself
between both of them.


** Forget making false comparisons with resistors or inductors.

Caps have the unique ability to store energy in isolation.



And inductors don't?

---
Not after the charging source is disconnected, I think.

NMR/MRI magnets are installed, cooled down, and charged with a big
power supply. The installer then shorts the magnet, puts the power
supply into his truck, and drives away. As long as the helium is kept
topped off, every couple of months, the current circulates and the
field stays.

And inductor is the dual of a capacitor. Both store energy.

---
Yeah, sure, but I wouldn't think "in isolation" included the cooling
equipment.


--
JF
.

Relevant Pages

  • Re: capacitances in parallel
    ... the capacitances in parallel in add up. ... ** Forget making false comparisons with resistors or inductors. ... Caps have the unique ability to store energy in isolation. ...
    (sci.electronics.basics)
  • Re: capacitances in parallel
    ... the capacitances in parallel in add up. ... ** Forget making false comparisons with resistors or inductors. ... The installer then shorts the magnet, ...
    (sci.electronics.basics)
  • Re: capacitances in parallel
    ... the capacitances in parallel in add up. ... ** Forget making false comparisons with resistors or inductors. ... Caps have the unique ability to store energy in isolation. ... The magnets don't have cooling equipment as such, ...
    (sci.electronics.basics)
  • Re: capacitances in parallel
    ... John Larkin wrote: ... the capacitances in parallel in add up. ... ** Forget making false comparisons with resistors or inductors. ...
    (sci.electronics.basics)
  • Re: capacitances in parallel
    ... the capacitances in parallel in add up. ... value of two resistances in series is the sum of te two resistance ... ** Forget making false comparisons with resistors or inductors. ...
    (sci.electronics.basics)