WorksheetsElectricity/magnetism Review
Total questions: 58
Worksheet time: 1hrs 18mins
Name
Class
Date
1.
Which best describes a parallel circuit?
a)
Electricity flows along one pathway.
b)
The flow of electricity comes from one source.
c)
Electricity flows along more than one pathway.
d)
The flow of electricity comes from more than one source.
2.
What is one problem with using a series circuit?
a)
It has a lot of series.
b)
If one bulb goes out, they all go out!
c)
It doesn't work properly.
d)
There are no problems.
3.
A material in which electrons are not able to move easily is a(n) ______________________.
a)
circuit
b)
insulator
c)
resistance
d)
conductor
4.
What kind of circuit is this?
a)
series
b)
parallel
5.
What is a switch's function in a circuit?
a)
to make the current hotter or colder
b)
to turn on and off the flow of current
c)
it is the pathway through which current flows
d)
to add more power to the circuit
6.
The path through which electricity flows is called a _________.
a)
trail
b)
circuit
c)
receiver
d)
power source
7.
Pick the correct sentence.
a)
This circuit will work because it is a closed circuit.
b)
Energy will freely flow in this circuit.
c)
This circuit will not work because there is no energy source.
d)
This circuit will not work because there is no switch.
8.
If you increase the voltage of the source in a parallel circuit, what happens?
a)
Current decreases
b)
Current increases
c)
Electrons disappear
d)
Bulbs get dimmer
9.
If you have a 3 bulb series circuit, what will happen if one of your light bulbs goes out?
a)
Bulbs get brighter
b)
Bulbs get dimmer
c)
Bulbs go out
d)
Nothing happens
10.
If you add a second battery to your series circuit, what will happen to the current in your circuit?
a)
Decrease
b)
Increase
c)
Stay the same
11.
Why are homes not wired in series circuits?
a)
The house will burn down
b)
If you turn off one appliance, the rest will turn off.
c)
Homes are wired in series circuits.
12.
In a parallel circuit if one of the light bulbs burns out the rest _________.
a)
stop the flow of electricity
b)
can still light up
c)
will go out
d)
of the light bulbs burn out also
13.
What does the current in a wire tell you?
a)
The speed of electron flow through it.
b)
How tough it is for electrons to flow through it.
c)
The amount of energy given to the electrons.
d)
The amount of energy taken away from the electrons.
14.
What does the voltage on a battery mean?
a)
The speed of electron flow through it.
b)
How tough it is for electrons to flow through it.
c)
The amount of energy given to the electrons.
d)
The amount of energy taken away from the electrons.
15.
What does the resistance of a wire tell you?
a)
The speed of electron flow through it.
b)
How tough it is for electrons to flow through it.
c)
The amount of energy given to the electrons.
d)
The amount of energy taken away from the electrons.
16.
Does this diagram represent a series or parallel circuit?
a)
series circuit
b)
parallel circuit
17.
How does alternating current differ from direct current?
a)
Alternating current produces more voltage than
direct current
b)
Alternating current always flows in the same
direction; the direction of a direct current switches back
and forth
c)
Direct current produces more voltage than
alternating current
d)
Direct current always flows in the same direction;
the direction of an alternating current switches back
and forth
18.
All wires used in electric circuits should be covered with:
a)
a colored material.
b)
a conducting material.
c)
an insulating material.
d)
none of these.
19.
When electricity moves in only one direction (usually a current from batteries).
a)
Alternating current
b)
Direct current
c)
Ionic current
d)
Both Alternating and Direct
20.
What does the arrows in the circuit represents?
a)
conventional current
b)
eletromotive force
c)
electron flow
d)
voltage
21.
If two batteries are in a circuit and the positive side is touching the positive side will the circuit work?
a)
Yes
b)
No
22.
Current is measured in what unit?
a)
ohms
b)
volts
c)
watts
d)
amps
23.
Which circuit (s) are parallel?
a)
A
b)
A and B
c)
B and C
d)
C
24.
Which one will still function if one light bulb goes out?
a)
A-Series
b)
B-Parallel
c)
A-Parallel
d)
B-Seriese
25.
If I add more light bulbs to a series circuit what happens?
a)
The current speeds up and the lights get brighter
b)
The current slows down and the lights dim lower
c)
The current speeds up and the lights dim lower
d)
The current slows down and the lights get brighter
26.
All of the following are insulators of electricity except _____.
a)
glass
b)
rubber
c)
plastic
d)
metal
27.
An object becomes postiively charged when which of the following occurs?
a)
loses electrons
b)
gains electrons
c)
loses protons
d)
gains neutrons
28.
Ms Jo Jo rubbed two balloons with a piece of wool. What will happen when the balloons are brought near each other?
a)
The balloons will repel each other.
b)
The balloons will attract each other.
c)
The balloons will become positively (+) charged.
d)
The balloons will pop.
29.
The accumulation of excess electric charge on an object is called
a)
Static electricity
b)
Electric discharge
c)
Resistance
d)
Circuit
30.
Electric charges that are alike _______ each other.
a)
Attract
b)
Repel
31.
If a substance has a higher number of electrons than protons on its surface, what type of charge does it have?
a)
A positive charge.
b)
A negative charge.
c)
A neutral charge
d)
No charge at all
32.
What happens when you touch a metal doorknob after rubbing your shoes on the carpet?
a)
The doorknob sends a burst of electric current into your body
b)
Millions of electrons go from your finger into the doorknob
c)
The doorknob sends millions of electrons into your finger
d)
our finger becomes negatively charged
33.
Which of the following is caused by static electricity?
a)
a stove getting hot when it is turned on
b)
a magnet being attracted to a refrigerator
c)
a lightning strike during a storm
d)
a light bulb coming on when a switch is turned on
34.
True or False, Lighting is a form of static electricity.
a)
True
b)
False
35.
Electrical charge built up on the surface of an object is called _________________.
a)
static electricity
b)
current electricity
c)
lightning
d)
electrons
36.
Why can you get a shock if you touch a metal doorknob after walking across a wool carpet?
a)
You have gained electrons; the doorknob has no electrons.
b)
You have gained neutrons; the doorknob has fewer electrons.
c)
You have lost electrons; the doorknob has many electrons.
d)
You have gained electrons; the doorknob has many electrons.
37.
Which of these materials is an insulator?
a)
Aluminum Paper
b)
Wool Sweater
c)
Copper Wire
d)
Silver Coin
38.
How are electrons different from protons and neutrons?
a)
Protons and neutrons are negatively charged; electrons are positively charged
b)
Protons and neutrons exist inside atomic nuclei; electrons orbit atomic nuclei
c)
Electrons exist inside atomic nuclei; protons and neutrons orbit atomic nuclei
d)
Protons and neutrons are positively charged; electrons have no charge
39.
Lightning is a form of static electricity. What can you infer about what happens when lightning strikes the ground?
a)
Protons and neutrons are transferred from the clouds to the ground
b)
The ground becomes negatively charged
c)
. Electrons are transferred from the clouds to the ground
d)
An electric current is established between the clouds and the ground
40.
What is static electricity caused by?
a)
A balance of power
b)
A balance of positive and negative charges
c)
. An imbalance of positive and negative charges
d)
An imbalance of protons and neutrons
41.
What is the difference between a conductor and an insulator?
a)
An insulator allows electricity to flow through it easily and a conductor does not
b)
A conductor allows electricity to flow through it easily and an insulator does not.
c)
An insulator is magnetic and a conductor is not
d)
A conductor is magnetic and an insulator is not
42.
Maria is putting gas in her car on a cold, dry night. Before she puts the metal gas nozzle to the metal rim of her gas tank, she wants to remove the excess electrons. To do so, she would touch the metal rim with a(n)
a)
plastic cup
b)
metal key
c)
wood stick
d)
rubber stopper
43.
This is a picture of a(n)
a)
electromagnet
b)
magnet
c)
insulator
d)
pole
44.
Chemical, potential energy is stored in a battery.
The negative end of a battery is connected to a wire.
The wire loops numerous times around an iron nail.
The wire is connected to the positive end of the battery
What would happen if you put another iron nail near this device?
The negative end of a battery is connected to a wire.
The wire loops numerous times around an iron nail.
The wire is connected to the positive end of the battery
What would happen if you put another iron nail near this device?
a)
It would be attracted to the device.
b)
It would be repelled by the device.
c)
It would gain a negative charge.
d)
It would spin.
45.
When there is a change in charge without actually touching the charged and uncharged objects to each other.
a)
induction
b)
conduction
c)
friction
d)
attraction
46.
A motor uses an electromagnet
a)
to change electrical energy to mechanical energy.
b)
to change mechanical energy to electrical energy.
c)
to change chemical energy to electrical energy.
d)
to turn electrical energy into light.
47.
What would increase the strength of an electromagnet?
a)
Increasing the amount of current flowing through the wire.
b)
Inserting a wooden core inside the coil
c)
Changing the direction of the current
d)
Decreasing the number of coils of wire
48.
When a bar magnet is broken in half, what is the result?
a)
Two N poles
b)
Two S poles
c)
Two N poles and two S poles
d)
The bar loses its magnetic properties
49.
A moving magnetic field causes current to flow is called...
a)
Electromagnetic Induction
b)
Magnetism
c)
North Pole
d)
Generator
50.
What kind of magnet can be turned on and off?
a)
refrigerator magnet
b)
electromagnet
c)
magnetite
d)
iron
51.
A tiny region in a magnet where all the atoms are grouped together and their poles are aligned.
a)
Domain
b)
North
c)
South
d)
Commutator
52.
Spinning electrons themselves are small
a)
magnets.
b)
atoms.
c)
generators.
d)
joules.
53.
If you wrap more coils around an electromagnet, it will become...
a)
brighter
b)
stronger
c)
weaker
d)
invisible
54.
This material is hard to magnetize, but stays magnetized
a)
temporary
b)
permanent
c)
ferromagnet
d)
electromagnet
55.
As an electron moves, it makes, or induces a(n)
a)
acceleration.
b)
ferromagnet.
c)
chemical reaction.
d)
magnetic field.
56.
Materials in which the atoms' magnetic fields cancel each other out are
a)
aligned in domains.
b)
like iron, nickel, and cobalt
c)
not magnetic
d)
magnetic
57.
Choose the best option to complete this gap:
A magnetic field is the ________ around a magnet in which the magnetic force acts.
A magnetic field is the ________ around a magnet in which the magnetic force acts.
a)
pole
b)
electron
c)
area
d)
iron
58.
When you put the poles of two magnets together they will either attract or repel each other. Which of these sentence is correct?
a)
If the two poles are the same the magnets repel each other.
b)
If the two poles are the same the magnets attract each other.
c)
If the two poles are different the magnets repel each other.
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