Download Circuit Review - Mayfield City Schools

DC Circuits Review
If you compare a circuit to a river
system, what represents the gravity
that makes the water move?
Po
te
nt
0%
rg
e
er
0%
Ch
a
ial
Di
ff.
..
0%
Po
w
0%
an
ce
0%
W
ir e
0%
Re
sis
t
Current
Wire
Resistance
Potential Difference
Power
Charge
Cu
rre
nt
1.
2.
3.
4.
5.
6.
If you compare a circuit to a river
system, what represents the rate that
the water flows in the river?
Po
te
nt
0%
rg
e
er
0%
Ch
a
ial
Di
ff.
..
0%
Po
w
0%
an
ce
0%
W
ir e
0%
Re
sis
t
Current
Wire
Resistance
Potential Difference
Power
Charge
Cu
rre
nt
1.
2.
3.
4.
5.
6.
If you compare a circuit to a river
system, what represents the boulders
in the river?
Po
te
nt
0%
rg
e
er
0%
Ch
a
ial
Di
ff.
..
0%
Po
w
0%
an
ce
0%
W
ir e
0%
Re
sis
t
Current
Wire
Resistance
Potential Difference
Power
Charge
Cu
rre
nt
1.
2.
3.
4.
5.
6.
If you compare a circuit to a river
system, what represents the water
molecules that are moving?
Po
te
nt
0%
rg
e
er
0%
Ch
a
ial
Di
ff.
..
0%
Po
w
0%
an
ce
0%
W
ir e
0%
Re
sis
t
Current
Wire
Resistance
Potential Difference
Power
Charge
Cu
rre
nt
1.
2.
3.
4.
5.
6.
How is current affected if the number of
electrons flowing in the circuit decreases?
sn
tia
ni
cu
rre
nt
i
nt
i
cu
rre
0%
ot
af
fe
ct
ed
.
de
c. .
.
0%
lly
ec
re
as
nt
d
Th
e
Th
e
cu
rre
nt
i
cu
rre
Th
e
0%
es
.
nc
re
as
es
.
0%
Th
e
1. The current increases.
2. The current decreases.
3. The current initially
decreases and then is
gradually restored.
4. The current is not
affected.
0%
pe
re
s
am
54
m
pe
re
s
0%
9a
am
pe
r
es
0%
1.
5
am
pe
re
s
0%
0.
67
1.
2.
3.
4.
A student connects six 1-ohm light bulbs in
series to a 9-volt battery. What is the total
circuit current?
0.67 amperes
1.5 amperes
9 amperes
54 amperes
The power used by a circuit can be
found by:
0%
pl
y
nd
ea
ta
g
ol
ng
a
ad
di
0%
...
nc
es
.
re
s is
ta
ll
by
c
ta
ge
gv
ol
0%
m
ul
ti
di
v
id
in
us
in
gO
hm
’s
l
ur
re
nt
.
aw
.
0%
in
gv
1. using Ohm’s law.
2. dividing voltage by
current.
3. adding all
resistances.
4. multiplying voltage
and current.
When electrons move through a
metal conductor,
o.
..
th
e
at
ov
e
th
ey
m
pe
ra
t
te
m
th
e
0%
sp
ee
d
...
he
ur
e
za
g
zig
in
0%
of
t
pa
ht
l
ig
str
a
a
th
ey
m
ov
e
in
ov
e
0%
tt.
..
.. .
0%
th
ey
m
1. they move in a straight line
through the conductor.
2. they move in zigzag patterns
because of repeated
collisions with the vibrating
metal atoms.
3. the temperature of the
conductor decreases.
4. they move at the speed of
light in a vacuum.
In a conductor that carries a current,
the drift velocity of an electron is
1. less than the average
speed of the electron
between collisions.
2. equal to the average speed
of the electron between
collisions.
3. greater than the average
speed of the electron
between collisions.
4. approximately equal to the
speed of light.
p.
..
es
av
er
ag
eq
ua
lt
o
th
e
th
e
ha
n
le
ss
t
0%
0%
0%
av
er
gr
ag
ea
es
te
p.
rt
..
ha
n
th
ap
e
av
pr
er
ox
ag
im
. ..
at
el
ye
qu
al
to
. ..
0%
Tripling the current in a circuit with
constant resistance has the effect of
changing the power by what factor?
0%
0%
27
0%
3
0%
9
2
3
9
27
2
1.
2.
3.
4.
Tripling the resistance in a circuit with
constant voltage has the effect of
multiplying the current by what factor?
3
9
1/3
1/9
0%
0%
0%
0.
9
33
33
33
33
33
33
3.
0.
..
11
11
11
11
11
11
1.
..
0%
3
1.
2.
3.
4.
When more devices are added to a series
circuit, the total circuit resistance:
ea
se
in
cr
ay
m
0%
ea
s..
sa
m
e.
th
e
st
ay
s
in
cr
0%
or
de
cr
0%
ea
se
s.
0%
ea
se
s.
decreases.
increases.
stays the same.
may increase or
decrease,
depending on the
device.
de
cr
1.
2.
3.
4.
When more branches are added to a
parallel circuit, the total circuit resistance:
ea
se
in
cr
ay
m
0%
ea
s..
sa
m
e.
th
e
st
ay
s
in
cr
0%
or
de
cr
0%
ea
se
s.
0%
ea
se
s.
decreases.
increases.
stays the same.
may increase or
decrease,
depending on the
device.
de
cr
1.
2.
3.
4.
In a series circuit, which of the
following stays constant throughout
the circuit.
Power
Resistance
Current
Voltage
ta
g
e
0%
Vo
l
0%
Cu
rre
nt
an
ce
0%
Re
sis
t
er
0%
Po
w
1.
2.
3.
4.
In a series circuit, the total of which of
the following will increase if another
device is added to the circuit.
Power
Resistance
Current
Voltage
ta
g
e
0%
Vo
l
0%
Cu
rre
nt
an
ce
0%
Re
sis
t
er
0%
Po
w
1.
2.
3.
4.
What is the device called that
functions in series with a circuit as a
safety device for excess current?
Rheostat
Potentiometer
Firewall
Breaker
Switch
it c
h
0%
Sw
er
0%
Br
ea
k
Fir
ew
io
m
Po
te
nt
0%
all
0%
et
er
t
0%
Rh
eo
st
a
1.
2.
3.
4.
5.
If you add batteries to an existing
circuit, which of the following will not
increase?
Potential difference
Resistance
Current
All of them will
increase
0%
0%
Al
l
of
t
he
m
w
i..
.
Cu
rre
nt
an
ce
0%
Re
sis
t
ial
di
ff
...
0%
Po
te
nt
1.
2.
3.
4.