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Electro-magnetism Quiz
NAME:
1.
BLOCK:
The diagram below shows current ow through a
wire.
2.
The diagram below shows two aluminum spheres.
Which of the following represents the magnetic
eld resulting from the current?
A.
Aluminum sphere A contains a small negative
charge and is touched by aluminum sphere B,
which has a larger negative charge. Which of the
following occurs next?
B.
C.
A.
Protons ow from sphere B to sphere A.
B.
Protons ow from sphere A to sphere B.
C.
Electrons ow from sphere B to sphere A.
D. Electrons ow from sphere A to sphere B.
D.
page 1
3.
Use the information and table below to answer the following question(s).
Students studied the physical properties of the four metals listed in the table below.
PROPERTIES OF FOUR METALS
Metal
Appearance
Conduct
Electricity
and Heat
Yes
Magnetic
Melting
Point ( C)
Zinc
Bluish white,
shiny pieces
No
419
Iron
Dark gray,
shiny pieces
Yes
Yes
1,539
Aluminum
Silver,shiny
pieces
Yes
No
660
Magnesium
Light gray,
shiny pieces
Yes
No
650
The students mixed small pieces of the four metals on a plate.
Material
Amount Added
to Plate (grams)
Zinc
2.0
Iron
3.0
Aluminum
4.0
Magnesium
5.0
The students pulled a magnet through the mixture several times. The magnet attracted and removed small pieces of
some metals from the plate.
The mass of the metals remaining on the plate was closest to
A.
NAME:
2.0 grams
B.
7.0 grams
C.
page 2
11.0 grams
D. 14.0 grams
Electro-magnetism Quiz
4.
Which of the following diagrams correctly
demonstrates the magnetic elds around a bar
magnet?
6.
A.
A student wraps a wire around an iron nail. The
student then connects the wire to a battery. The
nail attracts another nail and they stick together.
What force holds the two nails together?
A.
gravitational force
B.
magnetic force
C.
electric force
D. friction force
B.
C.
7.
D.
5.
A copper sphere, a glass sphere, a plastic sphere,
and a rubber sphere are placed on individual
insulating stands. A student touches each sphere
with an electrically charged object.
Which of the following would cause the
galvanometer needle to move?
The sphere made of which material will distribute
the electric charge fastest over its entire surface
area?
A.
copper
B.
C.
plastic
D. rubber
The diagram below shows copper wire wrapped
around a cardboard tube, which is then attached
to a galvanometer. A galvanometer detects and
measures small amounts of electric current.
glass
A.
wrapping additional wire around the tube
B.
uncoiling the wire wrapped around the tube
C.
moving a magnet back and forth inside the
tube
D. moving an aluminum block up and down
inside the tube
NAME:
page 3
Electro-magnetism Quiz
8.
The magnitude of an electric eld created by a
charge of 2:5 10 9 C is measured at a distance
of 0.04 m. How will the magnitude change if the
distance is increased?
A.
The magnitude will decrease, because the
electric eld's strength decreases with
increased distance.
B.
The magnitude will decrease, because the
electric eld is directed inward toward the
charge.
C.
The magnitude will increase, because the
electric eld is directed outward from the
charge.
10.
D. The magnitude will increase, because the
electric eld's strength increases with
increased distance.
An electric circuit is shown.
Why does the compass needle move when the
compass is placed near the wire?
A.
because electric current makes the light bulb
give o thermal energy
B.
because electric current produces magnetic
forces
C.
because of the plastic coating on the wires
D. because of the light of the bulb
9.
The distance between two charges is represented
by d. In which of the following diagrams is
the attractive force between the two charges the
greatest?
A.
B.
C.
D.
NAME:
page 4
Electro-magnetism Quiz
11.
This gure shows the electric eld around two
positive charges placed near each other.
12.
According to the electric eld lines, how will the
charges move?
A.
They will move toward each other and spin
because they are unbalanced charges.
B.
They will move apart and in the same
direction because one charge is larger than the
other.
C.
They will move toward each other and collide
because like charges attract each other.
Stacie wants to make an electromagnet using a
copper wire wrapped around an iron bar, as shown
below.
To make the bar an electromagnet, what should
Stacie do next?
A.
connect the wire to a bulb
B.
heat the wire around the bar
C.
send a current through the wire
D. touch the ends of the wire together
D. They will move apart and in opposite
directions because like charges repel each
other.
13.
A student coils a bare copper wire around a
metal rod and attaches the ends of the wire to an
ampmeter. He quickly moves a magnet past the
coil and notes the resulting current. How could
the student alter this apparatus to create a larger
current?
A.
use thinner wire
B.
use insulated wire
C.
increase the length of the rod that is used
D. increase the number of times the wire is
coiled around the rod
NAME:
page 5
Electro-magnetism Quiz
14.
Two oppositely charged particles are held in place
near each other. When the particles are released,
they will most likely
A.
accelerate away from each other.
B.
accelerate toward each other.
C.
rotate in a clockwise direction.
17.
An electromagnet is shown below.
D. rotate in a counterclockwise direction.
15.
Which change would decrease the strength of the
electromagnet?
Which of the following conditions results in the
buildup of static charge on an object?
A.
when neutrons outnumber electrons
B.
when there are more protons than neutrons
C.
when there are more electrons than protons
using an iron nail
B.
using an additional battery
C.
using more wire coils around the nail
D. using fewer wire coils around the nail
D. when all neutrons have been removed from
the object
16.
A.
A balloon is rubbed with a piece of cloth. As a
result, the balloon has a negative charge. What
has happened?
A.
Electrons have moved from the inside to the
outside of the balloon.
B.
Positive charges have traveled from the
balloon to the cloth.
C.
Electrons have moved from the balloon to the
cloth.
D. Electrons have traveled from the cloth to the
balloon.
NAME:
page 6
Electro-magnetism Quiz
18.
Hikers often use a compass and a map to
determine their location. The needle on a compass
moves and aligns with the magnetic eld of Earth
because the needle is magnetized.
Which action most likely a ects the accuracy of a
compass?
A.
changing hiking speed
B.
moving to a high altitude
C.
changing hiking speed and direction
D. moving close to overhead power lines
NAME:
page 7
Electro-magnetism Quiz
19.
A student performed an experiment to determine the number of paper clips that are attracted to an electromagnet
as the amount of current changes.
Data Table
Current
5A
10 A
15 A
20 A
Number of
Paper Clips
20
40
60
80
Which graph best describes the relationship between magnetism and electrical current?
A.
B.
C.
D.
NAME:
page 8
Electro-magnetism Quiz
20.
A balloon has a negative charge. A glass rod has
a positive charge.
21.
A charged pith ball is placed between two xed
charges. The pith ball swings in the direction
shown.
What will happen when the glass rod is brought
near the balloon?
What is the charge on the pith ball?
A.
The balloon will be attracted to the rod.
B.
The balloon will be repelled by the rod.
A.
positive, because unlike charges attract
C.
The balloon will remain in place.
B.
positive, because unlike charges repel
C.
negative, because unlike charges attract
D. The balloon will spin in circles.
D. negative, because unlike charges repel
NAME:
page 9
Electro-magnetism Quiz
22.
Which of the following graphs best represents how
the force between two identical electric charges
varies as the charges move away from each other?
23.
This diagram shows two copper spheres. Sphere 1
is negatively charged, and Sphere 2 is neutral.
A.
B.
What will be the result when the two spheres
touch?
C.
Sphere 1 will become positively charged.
B.
Sphere 2 will become positively charged.
C.
Both spheres will become negatively charged
equal to the initial charge of Sphere 1.
D. Both spheres will become negatively charged
less than the initial charge of Sphere 1.
D.
NAME:
A.
page 10
Electro-magnetism Quiz
24.
A positively charged glass rod touches a metal
sphere placed on an insulated stand, as shown in
the diagram.
25.
In which case would it take the most e ort to
make points 1 and 2 on the magnets touch each
other?
A.
B.
C.
D.
Why does the metal sphere acquire a positive
charge?
A.
Electrons move from the glass rod to the
metal sphere.
B.
Electrons move from the metal sphere to the
glass rod.
C.
Protons move from the glass rod to the metal
sphere.
D. Protons move from the metal sphere to the
glass rod.
NAME:
page 11
Electro-magnetism Quiz
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NAME:
1.
Answer:
Points:
B
1
2.
Answer:
Objective:
Points:
Electro-magnetism Quiz
BLOCK:
3/29/2022
12.
Answer:
Objective:
Points:
C
MA 8
1
C
MA 5.1
1
3.
Answer:
Objective:
Points:
13.
Answer:
Objective:
Points:
D
D.INQ.6
1
C
4.B.1.c
1
14.
Answer:
Points:
B
1
4.
Answer:
Objective:
Points:
B
3.05
1
15.
Answer:
Objective:
Points:
C
MA 5.1
1
5.
Answer:
Objective:
Points:
A
MA 5.1
1
16.
Answer:
Points:
1
6.
Answer:
Objective:
Points:
B
OH 5.E
1
17.
Answer:
Objective:
Points:
D
5.C.3.b
1
7.
Answer:
Objective:
Points:
C
MA 5.6
1
18.
Answer:
Objective:
Points:
D
5.C.3.d
1
8.
Answer:
Objective:
Points:
A
Phy.3
1
19.
Answer:
Objective:
Points:
B
4.03
1
9.
Answer:
Objective:
Points:
B
MA 5.4
1
20.
Answer:
Points:
A
1
10.
Answer:
Objective:
Points:
B
OH 5.E
1
21.
Answer:
Objective:
Points:
C
Phy.3
1
11.
Answer:
Objective:
Points:
D
Phy.3
1
22.
Answer:
Objective:
Points:
B
MA 5.4
1
23.
Answer:
Points:
D
1
Teacher's Key
24.
Answer:
Points:
B
1
25.
Answer:
Objective:
Points:
C
MA 9
1
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