Steps in a Working Motor
What flows through the wires to the brushes?
What is electricity.
List the two parts of a magnet where the force is the strongest.
What are the north and south poles?
This is where a compass needle always points.
What is north?
This is what happens to the strength of a magnet when magnets are combined.
What is it will become stronger?
True or False: Earth's magnetic poles move.
What is true?
Brushes conduct electricity to the what?
What is the commutator?
List two examples of types of poles that will repel.
What are north and north and south and south?
This is the word that means push apart.
What is repel?
This is the difference between the domains in something that is magnetized and something that is not.
What is the domains are lined up in something that is magnetized and the domains are jumbled in something that is not?
Farmers sometimes give a magnet to this animals to swallow.
What is cow?
Commutator ______________ switches electricity on and off at the right time.
What is automatically?
List the two metals from our study guide that are not magnetic.
What are copper and aluminum?
This is what the earth acts as if it is.
What is magnet?
This is the difference between a magnet and a magnetic object.
What is a magnet will attract and repel and a magnetic object will only attract?
Many roller coasters use this to push the cars along the tracks.
What is an electromagnet?
Like poles of electromagnet repel like poles of the permanent magnets in ___________ __________.
What is motor casing?
What are iron, nickel, or cobalt?
This is the sea animal that uses magnetism to navigate.
What is turtle?
This is the difference between magnetic poles and geographic poles.
What is magnetic poles are where Earth's magnetic force is strongest and geographic poles are ninety degrees from the Equator?
This is what MRI stands for.
What is magnetic resonance imaging?
The repelling causes the ____________ with the motor ___________ to spin.
What are armature and shaft?
List the three things you need for an electromagnet.
What are magnetic core, battery, and coil of wire?
This is the name of a rock that is a natural magnet.
What is lodestone (or magnetite)?
This is the role of the commutator in the steps of a working motor.
What is automatically switches the electricity on and off at the right times?
This is the most powerful magnet in the universe.
What is magnetar? (These are stars that have died off and had a supernova explosion. The magnetars are what is left over, and they are strong enough to destroy small planets if they get close enough. Luckily, there are only a dozen of these according to scientists, and they are far far far away from Earth.)