Show:
Magnetism
Electricity
Circuit
Conductors and Insulators
Electromagnets
100
What would happen if the north ends of two magnets were close together?
What is repel?
100

What is the measurement of unit for resistance?

Ohm's

100
Is a circuit open or closed if you haven't turned on the switch?
What is open?
100
What is a material that lets electric current pass through?
What is a conductor?
100
True or False: An electromagnet is a permanent magnet.
What is 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 _________.
What is attract?
200

True or False: Like charges attract and unlike charges repel.

What is False? Like charges repel and unlike charges attract.

200
What supplies current to an electrical circuit?
What is a battery (or other electrical source)?
200
What is a material that blocks an electric current from passing through?
What is an insulator?
200
True or False: An electric crane is an example of an electromagnet.
What is True?
300
True or False: All magnets have the same shape and size.
What is False?
300

What is the measurement of unit for current?

amps or ampere

300
What part of a circuit does electrical energy change from one form to another?
What is a load (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?
What is wood?
300
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.
400
True or False: All magnets have a north and south pole.
What is True?
400

What is the measurement of unit for voltage?

volts
400
True or False: When you turn on a light, the switch is opening the circuit.
What is False? A switch closes the circuit to turn on the light.
400
Which of these materials is a conductor: rubber, glass, air, silver?
What is silver?
400
An electromagnet must be part of an electrical ______.
What is circuit?
500
Will a magnet attract copper, rubber, iron, or plastic?
What is iron?
500

What is the formula for finding current?

I = V/ R

500
An electrical circuit is made up of a connector (wire), a load (lightbulb), a switch, and a ____________.
What is a battery (or electrical source)?
500
True or False: Pure water is a conductor.
What is 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?
What is an iron bar (nail), battery, and a wire?