inductor measurement
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From: Bob Eld on 22 Apr 2010 10:57 "lerameur" <lerameur(a)yahoo.com> wrote in message news:ac59d2fa-b968-4360-8268-c781a762e48b(a)i40g2000yqd.googlegroups.com... > > > Hi, > > I would like to know if there is a relationship other then between cm > and henries in an inductor: > Here is a link where a tesla coil is made and measurements are made in > cm and converted in Henries. Any can illuminate me on this ? > First example on top of this link > http://www.bibliotecapleyades.net/tesla/coloradonotes/coloradonotes10.htm > > Have a great day > > K Yes there is a relationship. cm or centimeter was used at one time for the electromagnetic cgs unit of inductance. This is also known as an abhenery. 1 abhenery (cm) = 10^-9 henrys. You can see this relation in their numbers: 0.00955 = 9,550,000 * 10^-9 Nine millihenrys = 9 million abhenrys or cm. The rationalized MKS system (SI) has done away with abhenrys, abvolts, stathenrys, statfarad and other confusing nonsense of the cgs system. See, the metric system isn't as simple as you thought.
From: baron on 22 Apr 2010 04:25
George Herold Inscribed thus: > On Apr 21, 8:27 am, lerameur <leram...(a)yahoo.com> wrote: >> Hi, >> >> I would like to know if there is a relationship other then between cm >> and henries in an inductor: >> Here is a link where a tesla coil is made and measurements are made >> in cm and converted in Henries. Any can illuminate me on this ? >> First example on top of this >> linkhttp://www.bibliotecapleyades.net/tesla/coloradonotes/coloradonotes10... >> >> Have a great day >> >> K > > My guess is that it's just a units thing. In the MKS system > inductance is in Heneries. In the cgs system the units are all weird, > and it may be that inductance has 'units' of centimeters... I seem to > recall that capacitance has units of inverse centimeters in cgs > units.... I haven't touched cgs units since doing JD Jackson back in > the dark ages. You might try googling inductance and units > conversion. > > George H. I would be vary wary of anybody using "Champagne Bottles"... :-) -- Best Regards: Baron. |