NEW
Font size
S
M
L
XL
WorksheetsCircuits, Electromagnets, Motors and Generators
Total questions: 40
Worksheet time: 59mins
Name
Class
Date
1.
A ______ opens and closes a circuit.
a)
power source
b)
conductor
c)
switch
d)
output device
2.
Electricity is the flow of _________.
a)
Protons
b)
Neutrons
c)
Electrons
3.
Which of these objects is an insulator?
a)
Copper Wire
b)
Paper Clip
c)
Steel Pole
d)
Rubber Gloves
4.
Which one is a conductor?
a)
wood
b)
iron
c)
plastic spoon
d)
paper
5.
The flow of electrical energy starts at the ___ side of the d-cell.
a)
negative
b)
positve
c)
complete circuit
d)
bulb
6.
Which subatomic particle has a negative charge?
a)
Proton
b)
Neutron
c)
Electron
7.
Metal is an example of this.
a)
conductor
b)
insulator
8.
When all parts of the circuit are connected it is a ______ circuit.
a)
open
b)
closed
9.
a device that supplies electrical energy
a)
source
b)
drain
c)
ground
d)
voltage
10.
a device that converts electrical energy into another form of energy
a)
load
b)
battery
c)
source
d)
AC outlet
11.
What makes an electromagnet stronger?
a)
Increase the number of wire wraps around the iron core
b)
decrease the strength of the power source
c)
remove the source of current
d)
lightning bolts hitting a tree
12.
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
13.
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.
14.
Which of the following is NOT part of an electromagnet?
a)
Wire
b)
Iron
c)
Toothpick
d)
Power source
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.
What is magnetism?
a)
Energy created by magnets
b)
A force created by magnets
c)
A contact force
d)
An invisible force that attracts electrically charged particles
17.
What are the ends of a magnet called?
a)
East and west poles
b)
Left and Right ends
c)
North and South ends
d)
North and South poles
18.
What is the name of the force that attracts or repels materials?
a)
current
b)
electricity
c)
magnetism
19.
Surrounding every magnet is a __________ __________.
a)
magnetic field
b)
force field
c)
electromagnet
d)
electromagnetic pulse
20.
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
21.
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
22.
When two magnets attract, they ______________
a)
push apart
b)
change color
c)
get colder
d)
pull together
23.
When two magnets repel, they ________________
a)
change color
b)
pull together
c)
push apart
d)
get colder
24.
In order to make an electromagnet, you need a
a)
battery, nail, and magnet
b)
battery, wire, and nail
c)
magnet, nail, and wire
d)
all of the above
25.
What would happen if you broke a magnet in half?
a)
Nothing
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
26.
What will happen when these magnets are brought close together?
a)
They will attract each other.
b)
They will repel each other.
c)
Both magnets will turn to the left
d)
Both magnets will turn to the right
27.
What does a motor do?
a)
Moves up and down
b)
Rotates without Electricity
c)
It does
d)
Uses Electricity to rotate
28.
What does a Capacitor do?
a)
Stores Energy Perminetly
b)
Stores Energy Temporarily
c)
Primarily used to Amplify Voltage
d)
Primarily used to Resist Voltage
29.
As water flows through a dam, a generator is turned and creates enough electricity for thousands of homes. This describes...
a)
biofuels
b)
hydroelectric energy
c)
geothermal energy.
30.
The picture below shows a turbine generator used to produce electricity at a geothermal power plant.
Electricity is produced by using steam to _____________.
Electricity is produced by using steam to _____________.
a)
heat the turbine generators
b)
spin the turbine generators
c)
reduce friction in the turbine generators
d)
reduce emissions from the turbine generators
31.
What is the job of the generator in a coal power plant?
a)
Use electrical energy to turn a turbine.
b)
Convert electrical energy into mechanical energy
c)
Turn the turbine which changes water into steam
d)
To change mechanical energy into electrical energy
32.
Mrs. Goodwyn's students are complaining that it is hot in the classroom. She plugs in the fan and turns it on, which energy transformation occurs?
a)
mechanical to electrical
b)
electrical to mechanical
c)
chemical to mechanical
d)
electromagnetic to mechanical
33.
Which form of energy is produced by the splitting of the nucleus of an atom?
a)
solar
b)
nuclear
c)
chemical
d)
none
34.
The Law of Conservation of Energy states that...
a)
energy can be destroyed
b)
energy can not be created or destroyed
c)
energy can only be destroyed using the force
35.
At which point is potential energy greatest?
a)
W
b)
X
c)
Y
d)
Z
36.
At which point is kinetic energy greatest?
a)
W
b)
X
c)
Y
d)
Z
37.
When a pendulum swings, at which point is kinetic energy highest?
a)
1
b)
2
c)
3
d)
4
38.
Which energy transformation is taking place in a flashlight?
a)
Chemical → Heat → Light
b)
Electrical → Chemical → Light
c)
Chemical → Light → Electrical
d)
Chemical → Electrical → Light
39.
This produces electrical energy when an electromagnet is rotated between magnets.
a)
Generator
b)
Motor
c)
Electromagnet
d)
Circuit
40.
This transforms mechanical energy into electrical energy.
a)
Generator
b)
Electromagnet
c)
Motor
d)
Circuit
Reset
