Elenco Electronics EP-130 - Page 158

-1
58
-
Ohm’s Law The relationship between
voltage, current, and resistance.
O
hm,
(
ΩΩ
)
T
he unit of measure for
r
es
i
s
t
a
n
ce
.
O
scillator
A
circuit that uses feedback to
g
enerate an AC output.
P
a
r
a
ll
e
l When several electrical
components are connected
b
etween t
h
e same po
i
nts
i
n t
h
e
circuit.
Pico-
(
p
)
A
pre
f
ix used in the metric
system. It means a millionth o
f
a millionth (0.000,000,000,001)
o
f
something.
Pit
c
h
T
he musical term for frequency
.
Printed
C
ircuit Board
A
board used for mounting
electrical com
p
onents.
Com
p
onents are connected
using metal traces
“
printed” on
t
he board instead o
f
wires.
Receiver
T
he device which is receivin
g
a
message
(
usually with radio
)
.
R
esis
t
a
n
ce
T
he electrical
f
riction between
an electric current and the
material it is
f
lowin
g
throu
g
h; the
loss o
f
ener
g
y
f
rom electrons a
s
t
he
y
move between atoms o
f
t
he material.
Resistor
C
om
p
onents used to control the
f
low o
f
electricity in a circuit.
T
hey are made o
f
carbon.
R
esis
t
o
r-Tr
a
n
sis
t
o
r-
A
t
y
pe o
f
circui
t
Lo
g
ic
(
RTL
)
arran
g
ement use
d
to construct
digi
ta
l
g
ates
.
Reverse-Biased When there is a voltage in the
direction of high-resistance
across a diode.
Saturation
T
he state of a transistor when
th
e c
i
rcu
i
t res
i
stances, not t
h
e
t
ransistor itself, are limitin
g
the
current.
Schemati
c
A
drawing of an electrical circuit
t
hat uses symbols for all the
components.
Semiconductor
A
mater
i
a
l
t
h
at
h
as more
resistance than conductors but
less
t
ha
n
i
n
sula
tor
s
.
I
t
is
used
to
construct diodes, transistors,
an
d
i
ntegrate
d
c
i
rcu
i
ts.
S
eries When electrical components
a
r
e
c
onn
ec
t
ed
on
e
a
ft
e
r th
e
o
t
he
r.
Short Circuit When wires
f
rom di
ff
erent parts
o
f a circuit
(
or different circuits
)
connect accidentally
.
S
ilicon
Th
e c
h
em
i
ca
l
e
l
ement most
commonly used as a
s
emiconductor.
S
peaker A device which convert
s
e
l
ectr
i
ca
l
energy
i
nto soun
d
.
S
witch A device to connect
(
“closed” or
“
on”
)
or disconnect
(
“o
p
en” o
r
“
off”
)
wires in an electric circuit.
Trans
f
ormer
A
d
ev
i
ce w
hi
c
h
uses two co
il
s t
o
chan
g
e the A
C
volta
g
e an
d
current
(
increasing one while
d
ecreasing the other
)
.
Tr
a
n
sie
nt
T
emporar
y
.
U
se
d
to
d
escr
ib
e
D
C
chan
g
es to circuits.
Tr
a
n
sis
t
o
r An
e
l
ec
troni
c
de
vi
ce
th
a
t
uses
a
s
m
a
ll
a
mo
u
nt o
f
cu
rr
e
nt to
control a lar
g
e amount o
f
cu
rr
e
nt.
Transm
i
tter
Th
e
d
ev
i
ce w
hi
c
h
i
s sen
di
ng a
message
(
usually with radio
)
.
Tunin
g
C
apacitor A ca
p
acitor whose value is
var
i
e
d
b
y rotat
i
n
g
con
d
uct
i
ve
p
l
ates over a
di
e
l
ectr
i
c.
V
ar
i
able Res
i
stor A resistor with an additional arm
contact t
h
at can move a
l
on
g
t
h
e
resistive material and tap o
ff
the
d
es
i
re
d
res
i
stance.
V
o
l
ta
g
e A measure of how stron
g
an
electric charge across a
m
a
t
e
r
ial
is
.
V
oltage Divider A resistor configuration to
create a lower volta
g
e.
V
olts
(
V
)
The unit o
f
measure
f
or voltage.