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WorksheetsElectricity and Electromagnets
Total questions: 20
Worksheet time: 2hrs 32mins
Name
Class
Date
1.
Which of the following are magnetic poles?
a)
North and South
b)
East and West
c)
Left and Right
d)
Red and Blue
2.
What do two unlike poles do when they are brought close together?
a)
Nothing
b)
Repel
c)
Attract
d)
Decrease
3.
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
4.
What do two unlike poles do when they are brought close together?
a)
Nothing
b)
Attract
c)
Repel
d)
Decrease
5.
What is one difference between electromagnets and bar magnets?
a)
Bar magnets can be turned off but electromagnets cannot
b)
Electromagnets need electricity but bar magnets do not
c)
Bar magnets have a magnetic field but electromagnets do not
d)
Bar magnets are bigger than electromagnets
6.
How can you reverse a magnetic field in a circuit?
a)
Connect the battery the other way around
b)
Use a different wire
c)
Increase the current
d)
Use a different battery
7.
What does the following picture represent?
a)
An electromagnet
b)
A permanent magnet
c)
A generator
d)
A motor
8.
What type of energy does a drawn bow and arrow have?
a)
Elastic potential
b)
Motion kinetic
c)
Chemical potential
d)
Nuclear potential
9.
Which of the following is a complete energy transformation for a flashlight? (Assume kinetic thermal in all transformations)
a)
Chemical energy > light energy
b)
Mechanical energy > electrical energy > light energy
c)
Chemical energy > electrical energy > light energy
d)
Chemical energy > electrical energy
10.
Which of the following represents a complete energy transformation for a ceiling fan? (Assume thermal kinetic occurs in all transformations.)
a)
Electrical kinetic energy > chemical potential energy
b)
Electrical kinetic energy > motion kinetic energy
c)
Mechanical energy > motion kinetic energy
d)
Chemical potential energy > electrical kinetic energy
11.
What is an example of a conductor?
a)
A wooden block
b)
A plastic fork
c)
A styrofoam cup
d)
Aluminum foil
12.
Which statement best describes an insulator?
a)
A material that allows electricity to flow through it
b)
A material that does not allow liquids to flow through it
c)
A material that does not allow heat to flow through it
d)
A material that cools down quickly when heated
13.
What is the purpose of a simple electric motor?
a)
To create a magnetic field
b)
To turn mechanical energy to electrical energy
c)
To convert electrical energy to kinetic energy
d)
To produce electrical energy
14.
What is the function of a switch in an electric circuit?
a)
To allow electrons to flow through the circuit
b)
To allow heat to flow through the circuit
c)
To allow chemicals to flow through the circuit
d)
To produce electricity
15.
If current decreases, what has likely happened to resistance?
a)
It increased.
b)
It decreased.
c)
It stayed the same.
16.
When voltage goes up, what must also increase if other factors stay the same?
a)
Resistance
b)
Insulation
c)
Current
17.
What is the name given to the force pushing the flow of electrons?
a)
Voltage
b)
Current
c)
Resistance
d)
Power
18.
Which is an advantage of a parallel circuit over a series circuit?
a)
If one bulb goes out, the other stays lit.
b)
The bulbs get dimmer as you add more.
c)
If one bulb goes out, all go out.
d)
It is prettier.
19.
How is voltage measured?
a)
Volts
b)
Ohms
c)
Amps
d)
Watts
20.
How is resistance measured?
a)
Volts
b)
Amps
c)
Ohms
d)
Watts
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