Electricity
A form of energy that involves the flow of electrical charges is called_____________?
What is electricity?
The flow of negative charges through matter
What is electric current?
A closed pathway that an electrical current flows
Circuit
What would happen if the north ends of two magnets were close together?
What is repel?
An electromagnetic force causes oppositely charged electrons to attract to each other
True or False
True
True or False: Like charges attract and unlike charges repel.
What is False? Like charges repel and unlike charges attract.
A measure of how much a material opposes the flow of electric current and changes electric current into heat energy.
What is resistance?
What is the most important part of a circuit
Battery or wires
If a south end of a magnet is close to a north end of a magnet, the magnets will _________.
What is attract?
A temporary magnet is formed when an electric current flows through a wire coiled around certain metal cores.
What is an electromagnet?
If you rub your hair on a balloon and the balloon becomes negatively charged, what charge will your hair have?
What is a positive charge?
An electric current passes easily through a wire that is this
What is a conductor?
A material that does not allow electricity to flow
Insulator
True or False: All magnets have the same shape and size.
What is False?
True or False: A refrigerator magnet is a permanent magnet.
What is True? Even when you take it off the refrigerator, it is still magnetic.
An object that attracts certain metals is called __________.
What is a magnet?
Something that an electric current does not easily pass through
What is an insulator?
A _________ contains a piece of metal that bends when it gets hot
Circuit Breaker
True or False: All magnets have a north and south pole.
What is True?
What's an example of a direct current?
A battery
True or False: Magnetism and electricity are not related.
What is False? They are related!!!
Ohms law states that the current equals _____ divided by resistance
Voltage difference
What type of circuit is this: It allows the flow of electricity to pass through multiple paths throughout a circuit.
Parallel Circuit
What is the area around the magnet where the force of the magnet can act called?
What is a magnetic field?
Look around the room and identify three devices you see that need electricity and magnetism to operate.
Speakers, cellphones, vacuums, security magnets on windows