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WorksheetsMilestones Review- Electricity and Magnetism
Total questions: 60
Worksheet time: 2hrs 33mins
Name
Class
Date
1.
What is gravity?
a)
A force
b)
Energy
c)
A push
d)
All of them
2.
Which object has a GREATER force of gravity?
a)
Ball
b)
Earth
3.
Which objects have a STRONG force of gravity?
a)
Objects with GREATER mass, like elephants
b)
Objects with LESS mass, like mice
4.
Any object with mass has gravity.
a)
True
b)
Sometimes
c)
False
d)
Never
5.
Gravity attracts all objects towards one another.
a)
False
b)
True
c)
It depends
6.
As distance between two objects increase the pull of gravity
a)
Increases
b)
Decreases
c)
Stays the same
7.
This type of material does not allow electricity to flow through it
a)
insulator
b)
resistor
c)
conductor
d)
non-electric
8.
When a ____ flows through a circuit a magnetic field is caused
a)
current
b)
protons
c)
water
d)
battery
9.
An object with the same number of negative and positive electrons is said to be
a)
neutral
b)
positive
c)
negative
d)
none of these
10.
This is a material that allows electricity to flow easily through it
a)
conductor
b)
resistor
c)
circuit
d)
contender
11.
An object with 21 positive charges and 20 negative charges is
a)
positively charged
b)
negatively charged
c)
balanced
d)
neutral
12.
Magnetism and electricity are NOT related at all
a)
true
b)
false
13.
Only some magnets have both a north and south pole
a)
true
b)
false
14.
Two like charges
a)
neutralize each other.
b)
repel each other.
c)
must be neutrons.
d)
attract each other.
15.
An atom loses an electron. What type of charge does it have now?
a)
positive
b)
negative
16.
An atom gains an electron. What type of charge does it have now?
a)
positive
b)
negative
c)
No charge
17.
When a balloon is rubbed on clothes it acquires a charge by ___________
a)
Induction
b)
reduction
c)
friction
d)
conduction
18.
After you rub a balloon on your hair, what charge does the balloon have?
a)
Positive
b)
Negative
c)
Neutral
19.
Which of the following is not a good conductor of electricity?
a)
copper
b)
silver
c)
Glass
d)
aluminum
20.
What is it called when an object gains a charge without touching a charged object but by being held near the charged object?
a)
Induction
b)
ESD
c)
Conduction
d)
Conducting path
21.
The atomic nuclei of almost all elements consists of
a)
protons
b)
protons and electrons
c)
protons and neutrons
d)
only neutrons
22.
Electrons are...
a)
positive
b)
negative
c)
neutral
23.
Protons are...
a)
positive
b)
negative
c)
neutral
24.
Electrical forces are stronger than gravitational forces.
a)
True
b)
False
25.
What direction are the electric field lines around an electron?
a)
towards the charge
b)
away from the charge
26.
What does it mean when the electric field lines are close together?
a)
the field is positive
b)
the field is negative
c)
The field is strong
d)
the field is weak
27.
Which of the following is not a good insulator?
a)
Copper
b)
Glass
c)
rubber
d)
wool
28.
Bob made an electromagnet but it was very weak. How can he make it stronger?
a)
take away a d-cell
b)
wrap the wire loosely
c)
use thicker wire
d)
use less winds
29.
Which rule explains why you would not use a brass rivet to make an electromagnet?
a)
opposites poles attract
b)
only iron and steel can become magnetized
c)
electricity flows from positive to negative
d)
metals conduct electricity
30.
What component becomes a temporary magnet when electricity is flowing through the circuit?
a)
d -cell
b)
wire coil
c)
switch
d)
core
31.
What component provides the pathway to carry electricity from component to component?
a)
d cell
b)
wire
c)
switch
d)
wire coil
32.
The strength of a magnet can be changed by
a)
adding less loops to the coil.
b)
adding more loops to the coil.
33.
The strength of an electromagnet can be affected by
a)
changing the current in the wire
b)
changing the space between the wires
c)
all of the above
d)
none of the above
34.
An example of the best insulator is
a)
copper
b)
salt
c)
plastic
d)
sand
35.
An example of a good conductor is
a)
copper
b)
sand
c)
plastic
36.
The coil of current-carrying wire with an iron core is called a(n)
a)
ferromagnet
b)
electromagnet
c)
compass
d)
maglev
37.
What effect will the south pole of one magnet have on the south pole of another magnet?
a)
Repulsive
b)
Attractive
c)
Combative
d)
No effect
38.
This is a picture of a simple electromagnet. How can the electromagnet be made stronger?
a)
Add more coils of wire to the nail.
b)
Use a smaller battery.
c)
Reverse the poles of the magnet.
d)
Remove all the coils and the nail.
39.
Surrounding every magnet is a __________ __________.
a)
magnetic field
b)
electrical current
c)
another magnet
d)
an enemy
40.
Any material that attracts iron or materials containing iron is a(n)
a)
A. electric generator
b)
B. solenoid
c)
C. magnet
d)
D. magnetic force
41.
How do electromagnets differ from regular magnets?
a)
A. They can be turned off and on
b)
B. Their polarity can be reversed
c)
C. Their strength can be changed
d)
D. All of the above
42.
A compass needle responds to a magnetic field, because the compass needle is a
a)
A. generator.
b)
B. motor.
c)
C. magnet.
d)
D. transformer.
43.
Where does a magnetic field occur in relation to an electrified wire?
a)
At either end, but not in the middle
b)
Only the side closest to source
c)
Around the entire length of wire
d)
Only the side furthest from source
44.
Why are paper clips attracted to magnets?
a)
They contain silver.
b)
They contain aluminum
c)
They contain tin.
d)
They contain iron.
45.
As distance between two objects increase the pull of gravity
a)
Increases
b)
Decreases
c)
Stays the same
46.
A person would weigh less on on the Moon than on the Earth because . . .
a)
Moon has more mass, and therefore more gravity
b)
Moon has less mass, and therefore more gravity
c)
Moon has more mass, and therefore less gravity
d)
Moon has less mass and therefore less gravity
47.
If Earth's mass was cut in half, what would happen to your mass?
a)
increase because gravitational force increases
b)
decrease because gravitational force decreases
c)
decrease because gravitational force increases
d)
nothing, mass is not affected by gravitational force
48.
If an object has more negative charges than positive charges, its electrcial charge is...
a)
positive
b)
negative
c)
neutral or no charge
d)
opposite
49.
If you rub a glass rod with a piece of silk, the rod becomes positively charged. This means that
a)
friction destroyed electrons in the rod.
b)
the silk has become negatively charged.
c)
protons have moved to the rod.
d)
glass attracts more protons.
50.
If you bring a charged object near an electrically neutral surface without allowing the object to touch the surface, the charges in the surface are rearranged by
a)
friction.
b)
convection.
c)
induction.
d)
conduction.
51.
Objects that have opposite charges
a)
are attracted to each other, and the force between the objects pulls them together.
b)
are attracted to each other, and the force between the objects pushes them apart.
c)
are repelled by each other, and the force between the objects pulls them together.
d)
are repelled by each other, and the force between the objects pushes them apart.
52.
A region around a charged particle that can exert a force on another charged particle is called an
a)
electric pulse.
b)
electric charge.
c)
electric force.
d)
electric field.
53.
Charging by ____ occurs when electrons are transferred from one object to another by direct contact.
a)
reduction
b)
induction
c)
conduction
d)
friction
54.
When you pull a cotton sweater off your skin, electrons are transferred from the ___________________ (cotton, skin) to the __________________ (cotton, skin). As a result, your body acquires a ___________ (+ , -) charge and the cotton sweater acquires a ___________ (+ , -) charge.
a)
skin, cotton, +, -
b)
cotton, skin, +, -
c)
skin , cotton, -, +
d)
cotton, skin, -, +
55.
An object becomes postiively charged when which of the following occurs?
a)
loses electrons
b)
gains electrons
c)
loses protons
d)
gains neutrons
56.
The girl's hair and the comb are attracting one another. The hair and the comb have
a)
opposite charges
b)
like charges
57.
How can you test to see if there is a current running through a wire?
a)
listen carefully to see if you hear a buzzing sound
b)
place several compasses around the wire
c)
place several batteries around the wire
58.
Permanent Magnets and Electromagnets are similar in which TWO ways?
a)
it can be turned off and on
b)
they both have a north and south pole
c)
they are surrounded by a magnetic field
59.
The arrow on magnetic field lines shows them flowing in which direction?
a)
Left to Right
b)
North to South
c)
South to North
d)
Right to Left
60.
Which of the following does not influence the strentgh of electromagnet?
a)
Number of turns of wire
b)
Magnitude of current flow in the wire
c)
Type of core
d)
Material used for insulator of the wire
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