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WorksheetsElectricity & Magnetism Unit Review
Total questions: 12
Worksheet time: 12mins
Which of the following describes electrical charges?
Like charges attract. Unlike charges repel.
Like charges attract. Unlike charges attract.
Like charges repel. Unlike charges attract.
Like charges repel. Unlike charges repel.
Which of the following is an example of static electricity?
A magnet attracting paperclips.
Ice sticking to a car's windshield on a cold day.
Glue holding two pieces of paper together.
socks from a dryer sticking together.
What is the purpose of a switch in an electrical circuit?
to allow the circuit to be opened or closed
To change the direction of the current
to provide a "push" for the electrons
to increase the power of the bulb
A circuit contains a battery, a wire, a switch, and a bulb. What would happen if you removed the battery?
The current would flow faster
The bulb would glow less brightly
The current would not flow
The bulb would glow more brightly
Which of the following materials are the BEST insulators.
steel paperclip
iron nail
plastic block
copper wire
Which MUST be included in an electromagnet.
light bulb
electric current
motor
switch
Which of these materials can BEST conduct an electric current?
cloth
rubber
sand
gold
You rub a plastic comb with wool. Why will the comb then attract small bits of paper?
The comb has a negative charge.
The comb has a magnetic attraction.
The comb and the paper both have a negative charge.
The bits of paper have an electrical charge.
A girl rubs a balloon against her hair. The balloon then has a negative charge. The girls hair....
was uncharged before but now has a negative charge.
was uncharged before but now has a positive charge.
had a positive charge before but now is uncharged.
had a negative charge before but now is uncharged.
An electromagnet can be used in a motor but a bar magnet cannot. This is MOSTLY because the electromagnet....
can be turned on and off
will attract all metal objects
is strongest near its ends
has magnetic poles.
Which is true about an electromagnet AND a bar magnet?
They both have a current in a wire
They both are attached to a battery.
They both have a north and a south pole
They both can be turned on and off
An object with a positive charge.
repels only positively charged objects
repels all charged objects
repels only negatively charged objects
repels objects with no charge
