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Lab A-1 What is a Circuit?
Part How many different combinations of the
battery, bulb and wire completed the
1. circuit?
1
2
3
4
None are correct
0%
t
0%
N
on
e
ar
e
co
rr
ec
4
0%
3
0%
2
0%
1
1.
2.
3.
4.
5.
1b
Explain why you think some
arrangements work?
• Wires must touch opposite ends of the
battery.
• One end of the wire must touch the end of
the light bulb or the metal thread of the
bulb
A 1a Which circuit below will light the bulb?
A and B
A and C
A and D
ABD
All will light
lig
h
D
t
0%
w
il
l
A
B
d
A
ll
A
a
n
d
A
a
n
d
n
a
0%
D
0%
C
0%
B
0%
A
1.
2.
3.
4.
5.
Part 2 The Switch works when the lever is
down and touching the metal – this
a b completes the circuit – CLOSED
OPEN – means
switch is up.
Part Is the switch open or closed?
2. Would the light be on or off?
Open and On
Open and Off
Closed and On
Closed and Off
C
lo
s
ed
an
d
O
n
an
C
lo
s
ed
n
pe
O
0%
d
an
d
O
n
an
d
n
pe
0%
O
ff
0%
O
ff
0%
O
1.
2.
3.
4.
Part Identify each symbol correctly –
3. a
Motor, switch, battery, wire
Bulb, wire, battery, switch
Bulb, battery, switch, wire
Motor, switch battery, wire
ry
,
...
h,
...
ba
tte
h
w
itc
ot
or
,s
M
ba
tte
ry
,
sw
itc
te
ry
,
ul
b,
B
B
ul
b,
w
ire
,b
at
h,
b
at
te
ry
...
s.
..
0% 0% 0% 0%
w
itc
ot
or
,s
M
1.
2.
3.
4.
Part 3
Example Diagram – Is it an Open
circuit ?
1. Yes
2. No
o
0%
N
Ye
s
0%
0%
...
no
ra
t
to
ar
e.
..
is
ns
e
tte
ry
bu
is
lb
tio
ba
e
Th
ne
c
on
ll
c
A
0%
n
0%
se
pa
1. All connections are
complete
2. The bulb is not on
3. The battery is
separate from the bulb
Th
Part 4
What does it mean to have a “closed
circuit”?
Which of the following did conduct
Part 5
electricity?
. ..
17%
te
d
co
nd
uc
er
c
lip
17%
Al
l
st
ra
st
ic
Pa
p
d
Ru
bb
er
17%
w
17%
Pl
a
ng
17%
st
ri
ca
p
17%
ba
n
Pen cap
string
Rubber band
Plastic straw
Paper clip
All conducted
electricity
Pe
n
1.
2.
3.
4.
5.
6.
Part 5
Which of the following materials can
electricity NOT travel through?
1. metal
2. water
3. air
What are conductors?
material through which electric
current flows easily.
m
r
0%
ai
et
al
material through which electric
current cannot move
w
What are insulators?
0%
at
er
0%
Lab A-2 Voltage and Current
Part 2 What is the voltage of 1 D-cell battery?
1. 1 amp
2. 1.5 volts
3. 1.5 coulombs
33%
s
m
b
o
m
p
1
.5
c
o
1
.5
u
lo
v
a
1
33%
lt
s
33%
Part 2 What is the voltage of 2 D-cell
batteries?
1. 2 amps
2. 3 volts
3. 2 coulombs
33%
b
s
lo
m
2
c
o
u
3
v
s
m
p
a
2
33%
o
lt
s
33%
Part 2 The DC current is measured in what
unit?
1. coulomb
2. volts
3. amperes
0%
m
v
p
e
o
re
s
lt
s
0%
a
c
o
u
lo
m
b
0%
Part 3 When measuring point A and B the
voltage readings were …
a
1. the same
2. Slightly less
3. Slightly more
s
m
o
s
le
a
h
li
g
S
S
li
g
h
tl
y
tl
y
s
e
th
33%
re
33%
m
e
33%
Part 4 How much current is flowing in the
circuit when the bulb is lit?
a
1. .06 amps
2. 1.5 volts
3. 110 amps
33%
0
1
1
1
.5
v
am
o
p
s
s
m
p
a
6
.0
33%
lt
s
33%
Part 4 If you leave the meter connected but
unscrew the bulb the bulb stays lit.
c
1. True
2. False
50%
ls
e
a
F
T
ru
e
50%
Lab A-3
Types of Circuits
Series and Parallel
Part 1. Does the current have any choice
a/b about where to go? Brightness of
bulbs?
Yes – bulbs very bright
Yes – bulbs somewhat bright
No – bulbs very bright
No – bulbs somewhat bright
What type of circuit is it?
–
o
N
...
ha
t
br
ig
h
–
bu
lb
s
so
m
ew
ve
r
y
ew
bu
lb
s
so
m
o
–
s
Ye
Ye
s
–
bu
l
bu
l
bs
bs
ve
ry
Series Circuit
ha
...
br
ig
h
t
t
0% 0% 0% 0%
N
1.
2.
3.
4.
Part What happens when you unscrew
one of the bulbs?
1. c
1. The other bulb stays lit
2. The other bulb goes out
Why?
50%
50%
ot
Th
e
2.
Th
e
ot
he
rb
ul
he
r
b.
..
...
Circuit is broken
Part
2. a /b
Yes – bulbs very bright
Yes – bulbs somewhat bright
No – bulbs very bright
No – bulbs somewhat bright
What type of circuit is it?
Parallel Circuit
...
ha
t
br
ig
h
y
ve
r
N
o
–
o
–
bu
lb
s
so
m
ew
ha
...
ew
bu
lb
s
so
m
N
–
s
Ye
s
–
bu
l
bu
l
bs
bs
ve
ry
br
ig
h
t
t
0% 0% 0% 0%
Ye
1.
2.
3.
4.
Does the current have any choice
about where to go? Brightness of
bulbs?
Part What happens when you unscrew
one bulb?
2. c
1. The other bulb stays lit
2. The other bulb goes out
Why?
rb
ul
ot
he
e
Th
Th
e
ot
he
rb
ul
b.
..
In a parallel circuit each
bulb has its own path to
the battery.
50%
b.
..
50%
Part Which type of circuit has brighter light
bulbs?
3. a
1. Parallel
2. Series
Why?
Pa
s
0%
rie
ra
l
le
l
0%
Se
In a parallel circuit each
bulb has its own path to
the battery.
Part
3b
Household wiring is a parallel circuit
with each device on a separate branch
of wiring. Advantages of this?
• With parallel circuit …
– Will provide a constant amount of energy to
each device no matter how many other
devices are on
– Can turn devices on and off without affecting
other devices
– If used a series circuit all appliances would
have to be on or off.
A-5 a
Complete the Chart Below
Both on
Both off
#1 on / #2 off
#1 off / #2 on
On
Off
Off
Off
A-5 b Is this an AND or OR circuit?
1. AND
2. OR
3. Both
0%
B
o
th
R
0%
O
A
N
D
0%
A-6 a
Complete the Chart Below
Both on
Both off
#1 on / #2 off
#1 off / #2 on
On
Off
On
On
A-5 a An AND circuit is also known as ….
1. Series circuit
2. Parallel circuit
3. Both
0%
th
o
ir
c
c
l
ll
e
ra
a
P
B
u
it
u
ir
c
c
s
ri
e
e
S
0%
it
0%
A-6 a Is this an AND or OR circuit?
1. AND
2. OR
3. Both
0%
B
o
th
R
0%
O
A
N
D
0%
A-6 a An OR circuit is also known as ….
1. Series circuit
2. Parallel circuit
3. Both
0%
th
o
ir
c
c
l
ll
e
ra
a
P
B
u
it
u
ir
c
c
s
ri
e
e
S
0%
it
0%
A-7
A car will sound if a warning bell if you
open the door and the lights are on.
What type of circuit is this?
1. AND / Series circuit
2. OR / Parallel circuit
3. Both
Bell sounds only if
door is open and
lights are on.
ir
c
c
l
ra
ll
e
P
a
/
R
O
th
o
it
u
ir
c
c
s
ri
e
e
/S
D
N
A
0%
B
0%
u
it
0%
A3-R Which is or are a series circuit?
0%
0%
ri
e
A
ll
a
re
s
B
e
C
B
D
s
0%
C
0%
B
AB
BC
BCD
All are series
A
1.
2.
3.
4.
1.
2.
3.
4.
5.
6.
A
Which of the following will be true?
B
C
A3-R
A and B
A and C
D
0%
d
A
an
d
an
A
0%
D
0%
B
0%
C
0%
B
A
0%
C
A. Bulb A is brighter than b and c
B. Bulb a is dimmer than b and c
C. Bulbs b and c are equally bright
D. Bulb a b and c are equally bright