[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: Capacitance HELP



Original poster: Jim Lux <jimlux@xxxxxxxxxxxxx>

At 09:10 PM 1/14/2006, you wrote:
Original poster: Allan & Sandra <allan_sandra@xxxxxxxxx>

HI List
From
Al Scott
Ok Here goes
UF - what does the u stand for if the f stands for Farads

microfarads... yes, it should be a greek mu, not a u, but it looks similar, and is usually understood from context



i know there is nanofarads =NF
Picofarads = PF
When you use the capacitance formula for a plate type cap your answer is in Picofarads, now if i wanted to make a cap with a value of 30NF my problem is i would like to know what all of the different units are - UF,PF,NF,MF,F,MFD, ect.and in what order and where they are
before and after the decimal point.
How many PF's are in a UF or NF

Historically, microfarads (1E-6 farad) and picofarads (1E-12 farads) were more common (older sources, you might see micromicrofarad).. Older abbreviations might be mfd, mmfd, mmf, etc.

1,000,000 microfarads in a Farad  (or 1000 in a milliFarad)

1,000,000 picofarads in a microfarad

In the last 20 years, the unit nanofarads (1E-9 farad) has become much more common because it's easier to work in terms of 22 nF than 0.022 uF, but you still see the ubiquitous 0.001 uF bypass capacitor (=1nF), for instance.


which one of these is closest to the right of the decimal point and what ones are the farthest
and what ones are in between and in what order and what ones did i mis if any.

Like a metric ruler you have MM CM ect. right up to Km or what ever is before MM
I have always hated metric
Thanks in Advance