Show:
Magnetism
Static Electricity
Circuit
Conductors and Insulators
Electromagnets
100
What would happen if the north ends of two magnets were close together?
repel
100
Socks taken from a clothes dryer that stick together is an example of ____________.
static electricity
100
Is a circuit open or closed if you haven't turned on the switch?
open
100
What is a material that lets electric current pass through?
a conductor
100
True or False: An electromagnet is a permanent magnet.
False. An electromagnet can be turned on or off. Once the circuit is broken, the magnetism is lost.
200
If a south end of a magnet is close to a north end of a magnet, the magnets will _________.
attract
200
True or False: Like charges attract and unlike charges repel.
False. Like charges repel and unlike charges attract.
200
What supplies current to an electrical circuit?
a battery (or other electrical source)
200
What is a material that blocks an electric current from passing through?
an insulator
200
True or False: An electric crane is an example of an electromagnet.
True
300
True or False: All magnets have the same shape and size.
False
300
If you rub your hair on a balloon and the balloon becomes negatively charged, what charge will your hair have?
a positive charge
300
What part of a circuit does electrical energy change from one form to another?
a load (example: lightbulb) This is where the energy changes to produce heat or light.
300
Which of these materials is not a conductor: copper, aluminum, gold, or wood?
wood
300
True or False: A refrigerator magnet is a permanent magnet.
True. Even when you take it off the refrigerator, it is still magnetic.
400
True or False: All magnets have a north and south pole.
True
400
True or False: Positive charges move from one object to another.
False. Only electrons (negative charge) move from one object to another.
400
True or False: When you turn on a light, the switch is opening the circuit.
False. A switch closes the circuit to turn on the light.
400
Which of these materials is a conductor: rubber, glass, air, silver?
silver
400
An electromagnet must be part of an electrical ______.
circuit
500
Will a magnet attract copper, rubber, iron, or plastic?
iron
500
True or False: A lightning bolt occurs when static electricity is created in the sky.
True
500
An electrical circuit is made up of a connector (wire), a load (lightbulb), a switch, and a ____________.
a battery (or electrical source)
500
True or False: Pure water is a conductor.
False. The salts and other materials in water are conductors though. So, don't mix water with an electrical circuit!!!!
500
An electromagnet is made up of what three items?
an iron bar (nail), battery, and a wire