Evening public ledger. [volume] (Philadelphia [Pa.]) 1914-1942, 1922-05-30
Test Your Condensers for "Shorts'
caoss SECTION OF
VARIABLE eoNoCNSsR

If you had a one-wire aerial with a
natural wave length os exactly 100
meters, you would suppose that, IL you
cut the wire precisely in the middle
tassuming there was some way Of keep.
ing the aerial from falling, the wave
length OF each separate half would be
exactly fifty meters. For practical pur-
poses, It would be. But theoretically
it wouldn't, and It would be possible
with extremely delicate measuring In
struments to prove that each half had
q wave length Of something more than
half the wave length Of the original
aerial.
This is because the two ends OF the
cut wire, assuming again that the aeriaI
didn't fall and that the ends we're
only slightly separated. would form
tiny condenser. A condenser. rs We
have already learned. has the ability TO
store up and release electrical energy
and these two ends would he able. by
this storage of energy, 10 add mite 10
the wave length Of each half Of the
wire.
Suppose now that We attached 20 each
Of these two ends metal plate and
placed these plates very close together
with their surfaces almost touching.
We would Fl once increase the capacity
~. nr.ss Is,e,h ~ zach half OF the
aerial.
The greater the surface Of the two
natal nlate, we thus place near to-
.s.h.rph,t ph not tomcbina~tbe more we
sSd to ths csnacitv Of the condenser.
snJ tbornfo,a ~ ths wave length Of
~" .srio,s
Rnt tho moment snr .inv nnrts of
%bess two metal plates touch each other
49, Sos. 70 ha condenser and be.
10y s;,,,p,,. CONDUCTOR instnad Of
sS..s 40 roIoosins oiartricnI en-
p ,naro,v rass eIectric current
esy' .ne! ~, S ,,,,rpnsss pn no ortft be-
.c.... a.sin oniv 1CN6. meter single
ro o.r;si
rThna ~ .,, ,,o+su =, a condenser
.o,.h =. becomes t"short circuitedI or,
~ rsj,a n.rlsncs "shorted. . and Is no
in,rs. nandsnssr NO matter how
,oan. nIo.ss !. hos or what Won Maid
~ ~ cordcnse- does not pass elec.
-, ,,rra,t thronch -. ,ts function is
ZIG cur'en. thlousu .h annrn,. -. corssd 90 bv tho
S;Ts.enc. n yo,tsas between the cur
-.rt. imn;n y,no an Tho ADJACENT mates.
Cs,Jopsns. o,,i.o often COT out az
i M,aJ condorse,s VIII meet with
sI:.. ~. ri,i nsr,ri, +wo ada
80 I.rs-. 90 ,,nSo,, ~ conner foil 70
seaS n.ha. a,d thnv are then
t..aJ'; .nS os,sa ~ ha conden sers
70 and.,... 10 s,hisc,eJ "a a cottage
xs.oa .oe s.,onH tor ,bs thin sub .
e ~. .anara %. Tho nIstes this
H..o sncs TN 20 r,nc.,,red hv an aloe :.
.s 80 ~ .,ro ne,.l sur.
sp nru. in eontsc,
Hy eon. .ianso im -. oil ,o,,,es
ie n a., ~. 60 ,as,ad - nanv
vw W Sn!s ~ nS .S.r, 80 f,od .,a !,
E S0o o W n..t - tha .ase Tbo
:. I' .I' on .t.nhad 70 .hoft IN tbe
WITT v.Ie s s .han sb,s sboF. e. +,,-,ed
sn aoiS :,.,.,n. anu VIZ h.,wasr %. stotinrary
~ r,,,ab ", ~ ~ ~. a n,hen yni,
ErMs dseS sc;on,iScaIiy and as
sI 90 nor.d tortha, and IN ,+her
ss. ~ .n,.i s,rfaca 20 aIi Tho nlates
:. tnc.sa. .ns 81 io which ;ncreasas tbe On .
,tS g ~. ."ndorsor
p-Soy !. soratTrnas h.nnsn. that o
v.r;sh,. condenser will have one point
=. tMs. ona niats bent mr. chinneG 90
-. nno rn"ir. IN nj. tnrnino II
Ill .c,,,h ,ba 70 above Az below n
~. osha-ts', tba whoIe condensar and
I.~troxs ita usefrlness
L.,