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WorksheetsElectricity and Magnetism Review
Total questions: 63
Worksheet time: 1hrs 29mins
Name
Class
Date
1.
What is the transfer of electricity in a motor?
a)
chemical to mechanical
b)
electrical to mechanical
c)
mechanical to electrical
d)
physical to potential
2.
What is the transfer of electricity in a generator?
a)
Mechanical to Electrical
b)
Physical to Potential
c)
Electrical to Mechanical
d)
Yogurt to Light
3.
Electric fields are often associated with what other kind of field?
a)
Magnetic Fields
b)
Nuclear Fields
c)
Particle Fields
d)
Corn Fields
4.
What device is made of coils of wire with an electrical current passing through it in order to generate a magnetic field?
a)
Electromagnet
b)
Generator
c)
Electron Magnet
d)
Motor
5.
What force does a magnetic field apply without actually touching the object?
a)
a push or pull
b)
gravity
c)
friction
d)
pressure
6.
What two forces are required for generators and electric motors to work?
a)
magnetism and thermal
b)
electricity and thermal
c)
electricity and magnetism
d)
magnetism and radiant
7.
What happens to the strength of an electromagnet as you add more coils around it?
a)
Increases
b)
Decreases
c)
Stays the same
d)
Stops completely
8.
Surrounding every magnet is a __________ __________.
a)
magnetic field
b)
electrical current
c)
another magnet
d)
an enemy
9.
If I were to try to connect the north pole of one magnet to the north pole of another magnet, the two poles would:
a)
attract
b)
repel
c)
neither
d)
flip
10.
If I were to try to connect the north pole of one magnet to the south pole of another magnet, the two poles would:
a)
attract
b)
repel
c)
neither
d)
flip
11.
While electric current is flowing through a wire, what surrounds the wire?
a)
a magnetic field
b)
a glowing light
c)
neutrons
d)
protons
12.
What is the flow of electrical charges called?
a)
Voltage
b)
Resistance
c)
Current/electricity
d)
Circuit
13.
Electricity is the flow of _________.
a)
Protons
b)
Neutrons
c)
Electrons
14.
Which subatomic particle has a negative charge?
a)
Proton
b)
Neutron
c)
Electron
d)
Enlighton
15.
How are electromagnets different from magnets?
a)
magnets can be turned on/off
b)
you can turn an electromagnet on/off
c)
magnets are more powerful
d)
magnets have a North and South pole
16.
In an electrical circuit the electrons flow from which end of the battery?
a)
the positive end
b)
the electrons don't flow, the protons do
c)
the negative end
d)
both ends
17.
Many metals are...
a)
resistors because the only let some electrons flow.
b)
conductors because they allow the electrons to flow
c)
insulators because they prevent the flow of electrons
18.
Brass, copper, and aluminum...
a)
are magnetic
b)
are not magnetic
19.
What type of current do batteries produce?
a)
direct current
b)
alternating current
c)
both
d)
neither
20.
Insulators...
a)
allow electrons to flow.
b)
resist electrons but allow some to flow.
c)
prevent the flow of electrons
d)
keep electrons warm.
21.
Where is the force of attraction the strongest on a magnet?
a)
the poles
b)
the center
c)
it is the same throughout the magnet
22.
A magnet has to touch an object to cause a force.
a)
True
b)
False
23.
What will happen to these two magnets?
a)
they will attract
b)
they will repel
24.
What kind of material is attracted to a magnet?
a)
silver
b)
water
c)
all metals
d)
iron
25.
A ______ opens and closes a circuit.
a)
power source
b)
conductor
c)
switch
d)
output device
26.
What is the relationship between electrical current and magnetic field strength in an electromagnet?
a)
When current is increased, magnetic field strength increases
b)
When current is increased the strength of magnetic field decreases
27.
What would happen if you broke a magnet in half?
a)
It would become a stronger magnet
b)
You would have two new pieces which would have a north and south pole
c)
Neither pole would be magnetic anymore
d)
You would have two magnets, one with only a north pole and the other with only a south pole
28.
This produces electrical energy when an electromagnet is rotated between magnets.
a)
Generator
b)
Motor
c)
Electromagnet
d)
Circuit
29.
In a parallel circuit if one light bulb goes OUT; then they ALL go out. TRUE OR FALSE?
a)
TRUE
b)
FALSE
30.
The picture shows an electrical circuit. This circuit is a series circuit because:
a)
It has 3 light bulbs.
b)
The same current flows through all three light bulbs.
c)
It uses a single battery.
d)
The electrical current has more than one path to flow through
31.
In a Series circuit the more light bulbs you add the brighter they get
a)
False
b)
True
32.
Which best describes a simple series circuit?
a)
Electricity flows along one pathway.
b)
The flow of electricity comes from the switch.
c)
Electricity flows along many pathways.
d)
The flow of electricity comes from the light bulb.
33.
This circuit has more than one loop. When one light goes out, the others stay on.
a)
closed circuit
b)
series circuit
c)
parallel circuit
d)
open circuit
34.
What type of circuit is show in the image?
a)
Series Circuit
b)
Parallel Circuit
35.
this circuit is .....?
a)
open
b)
parallel
c)
closed
d)
The cutest little circuit evah!
36.
Anything that uses electricity is a load.
a)
true
b)
false
37.
Across all the paths in a parallel circuit the voltage is the same,
a)
True
b)
False
38.
How much CURRENT does a 1200 W bread maker draw from a 110 V outlet?
P = IV
P = I2R
P = V2/R
P = IV
P = I2R
P = V2/R
a)
132000 amps
b)
0.09 amps
c)
1200 amps
d)
10.9 amps
39.
Ohm's Law
a)
V = IR
b)
P = IV
c)
v = d/t
40.
What is the unit for voltage?
a)
volts
b)
amps
c)
ohms
d)
watts
41.
What is the unit for current?
a)
volts
b)
amps
c)
ohms
d)
watts
42.
What is the unit for resistance?
a)
volts
b)
amps
c)
ohms
d)
watts
43.
What is the unit for power?
a)
volts
b)
amps
c)
ohms
d)
watts
44.
What is the rule for current in a SERIES circuit?
a)
stays the same
b)
adds up
c)
inverse of the sum of the reciprocals
45.
What is the total resistance of a 5 ohm, 10 ohm, and 15 ohm resistor hooked up in SERIES?
a)
10 ohms
b)
0.5 ohms
c)
30 ohms
d)
2.7 ohms
46.
What is the total resistance of a 5 ohm, 10 ohm, and 15 ohm resistor hooked up in PARALLEL?
a)
10 ohms
b)
0.5 ohms
c)
30 ohms
d)
2.7 ohms
47.
Which type of current is described: the current changes direction back and forth quickly (60 times per second in the US).
a)
AC
b)
DC
48.
Which type of current is described: the current flows in one direction from the power source to the load.
a)
AC
b)
DC
49.
If Georgia Power charges $0.0712/kWhr, how much would it cost to run a 9 kW garage heater for 3 days (72 hours)?
a)
$1.92
b)
$46.14
c)
$0.21
d)
$0.01
50.
The total current through this circuit is
a)
0.02 amps
b)
0.09 amps
c)
50 amps
d)
9 amps
51.
The total resistance in this circuit is
a)
100 ohms
b)
450 ohms
c)
400 ohms
d)
30 ohms
52.
What is one problem with using a series circuit?
a)
It uses a lot of materials
b)
If one goes down, they all go down
c)
It drains the battery faster than a parallel
d)
There are no problems.
53.
What is one benefit of using a parallel circuit?
a)
It drains the battery slower than a series
b)
There are no problems
c)
If one goes down, it does not affect the others.
d)
It uses less materials than a series
54.
Which one uses less wire?
a)
Parallel circuit
b)
Series Circuit
55.
this is the symbol for a _____?
a)
switch
b)
light
c)
battery
d)
wires
56.
The current going through the 90 ohm resistor is
a)
10 amps
b)
0.1 amps
c)
0.2 amps
57.
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.
58.
How is a permanent magnet DIFFERENT from a temporary magnet?
a)
A permanent magnet attracts materials made of iron.
b)
A permanent magnet has poles.
c)
A permanent magnet has a magnetic field.
d)
A permanent magnet keeps its magnetism for a long time.
59.
Which is a permanent magnet?
a)
a magnetized iron nail
b)
a magnetized paper clip
c)
a refrigerator magnet
d)
sandstone
60.
Changes electrical energy into mechanical energy
a)
generator
b)
electric motor
c)
electromagnet
61.
Produces an electric current when a coil of wire wrapped around an iron core is rotated near a magnet.
a)
generator
b)
electric motor
c)
electromagnet
62.
Used at power plants to produces electrical energy for our homes.
a)
generator
b)
electric motor
c)
electromagnet
63.
Which of the following materials would have the least electrical resistance?
a)
A very hot wire
b)
A very long wire
c)
A very thick wire
d)
A wire made of rubber
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