- published: 09 Jan 2013
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A capacitor (originally known as a condenser) is a passive two-terminal electrical component used to store electrical energy temporarily in an electric field. The forms of practical capacitors vary widely, but all contain at least two electrical conductors (plates) separated by a dielectric (i.e. an insulator that can store energy by becoming polarized). The conductors can be thin films, foils or sintered beads of metal or conductive electrolyte, etc. The nonconducting dielectric acts to increase the capacitor's charge capacity. Materials commonly used as dielectrics include glass, ceramic, plastic film, air, vacuum, paper, mica, and oxide layers. Capacitors are widely used as parts of electrical circuits in many common electrical devices. Unlike a resistor, an ideal capacitor does not dissipate energy. Instead, a capacitor stores energy in the form of an electrostatic field between its plates.
When there is a potential difference across the conductors (e.g., when a capacitor is attached across a battery), an electric field develops across the dielectric, causing positive charge +Q to collect on one plate and negative charge −Q to collect on the other plate. If a battery has been attached to a capacitor for a sufficient amount of time, no current can flow through the capacitor. However, if a time-varying voltage is applied across the leads of the capacitor, a displacement current can flow.
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(Puerta - Pack - North - Drummond)
Of man's progress I don't give a hoot
And man's estrangements Of nature's arrangements
Has given cause for my heartbreak To boot
The simple life though Filled with strife
And struggle with the land
Still remained its simple self
And that I understand
So city smog and dog eat dog
For some may hold sublime
Well as for me If I had my way
I'd had lived Some other time
Praise the prairie
And pass the cake
I'd like to eat it too
But being born now was my mistake
I've passed the buckaroo
I'd say
You're right
No chance Why fight?
Why be A cowboy star
(But) Hump back brahmas
Lovely cow mamas
Saw dust floor saloons
Dance hall queens Romanced in my dreams
So why pop my baloon?
No chance
Why fight?
Still in my own right
I'd be A cowboy star
Dreams of my life
Are so carried away
If just in my dreams
I could Be for one day
Just for one day
Lost in my dreams
I'll be riding away
like a cowboy star
Stage set: Sundown,