Elenco Electronics EP-130 - Page 157

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1
57-
El
ec
tri
c
Fi
e
l
d
The region o
f
electric attractio
n
or repulsion around a constan
t
voltage. This is usuall
y
associated with the dielectric i
n
a capac
i
tor
.
Electr
i
c
i
ty A flow of electrons betwee
n
atoms due to an electrica
l
charge across the material
.
Electrol
y
tic Capacitor A type of capacitor that has hig
h
capacitance and is used mostl
y
in low frequenc
y
circuits. It ha
s
polarity markings
.
El
ec
tr
o
n A sub-atomic
p
article that ha
s
an electrical char
g
e
.
Electronics The science o
f
electricity and it
s
app
li
cat
i
ons
.
Em
i
tter The out
p
ut o
f
an NPN bi
p
ola
r
j
unction transistor
.
E
n
code
To put a messa
g
e into a
f
orma
t
which is easier to transmit
.
Farad,
(
F
)
The unit o
f
measure
f
o
r
capac
i
tance
.
Feedback To adjust the input to somethin
g
based on what its out
p
ut i
s
d
o
i
ng
.
Fl
ip
-Flo
p
A t
y
pe o
f
transisto
r
con
f
i
g
uration is which the outpu
t
chan
g
es every time it receive
s
an in
p
ut
p
ulse
.
FM
F
requency mo
d
u
l
at
i
on.
The
f
requency o
f
the radio signal i
s
varied depending on the
in
f
ormation being sent
.
F
o
rw
a
r
d
-B
iased
The state o
f
a diode whe
n
current is flowin
g
throu
g
h it
.
Frequency The rate at which somethin
g
re
p
eats
.
G
enerator
A
de
v
ice
w
hich
uses
s
t
ea
m o
r
water pressure to move
a
magnet near a w
i
re, creat
i
ng a
n
e
l
ec
tri
c
cu
rr
e
nt in th
e
wir
e.
G
ermanium
A
c
h
em
i
ca
l
e
l
ement t
h
at
i
s use
d
as a semiconductor
.
G
round A common term for the 0V or “
–
” side of a battery or generator
.
Henry
(
H
)
The unit of measure fo
r
I
n
d
uctance
.
Inductance The ability of a wire to create a
n
induced voltage when th
e
current varies, due to magneti
c
effects
.
In
duc
t
o
r A component that oppose
s
c
h
an
g
es
i
n e
l
ectr
i
ca
l
current.
Integrated
C
ircuit A type o
f
circuit in whic
h
transistors, diodes, resistors
,
an
d
capac
i
tors are a
ll
constructed on
a
semiconductor base
.
Kilo-
(
K
)
A pre
f
ix used in the metri
c
system. It means a thousand o
f
something
.
L
i
ght Em
i
tt
i
ng D
i
ode A diode made
f
rom galliu
m
(
LED
)
arsenide that has a turn-o
n
energy so high that light i
s
generated when current
f
low
s
through it
.
Ma
g
net
i
c F
i
eld The re
g
ion o
f
ma
g
neti
c
attract
i
on or repu
l
s
i
on aroun
d
a
ma
g
net or an A
C
current. This i
s
u
sua
lly
assoc
i
ate
d
w
i
t
h
a
n
inductor or trans
f
ormer
.
Magnet
i
sm A
f
orce o
f
attraction betwee
n
certa
i
n meta
l
s.
El
ectr
i
c current
s
also have magnetic properties
.
Meg-
(
M
)
A
p
re
f
ix used in the metri
c
s
y
stem. It means a million o
f
somet
hi
ng
.
Micro-
(
μμ
)
A
p
re
f
ix used in the metri
c
system. It means a milliont
h
(
0.000,001
)
of somethin
g.
M
i
crophone
A
d
ev
i
ce w
hi
c
h
converts soun
d
waves into electrical ener
g
y
.
Milli- (m) A pre
f
ix used in the metri
c
system. It means a thousandt
h
(
0.001
)
of something
.
Modulation Methods used for encodin
g
r
adio signals with information
.
Morse
C
ode A code used to send messa
g
e
s
w
i
t
h
l
ong or s
h
ort transm
it
b
ursts
.
NAND
G
ate A type o
f
digital circuit whic
h
gives a HIGH output if some o
f
its inputs are LOW
.
NPN
N
e
g
at
i
ve-
P
os
i
t
i
ve-
N
e
g
at
i
ve,
a
t
y
pe of transistor construction
.