This is an example of a naturally occurring magnetic rock
What is a lodestone?
100
This device turns electrical energy into mechanical energy.
What is an electric motor?
100
This is a device that can change one AC voltage into another AC voltage.
What is a transformer?
100
Describe the orientation of the domains inside an unmagnetized piece of iron.
What is pointing in random directions?
100
Magnetic field lines that are close together indicate this.
What is a strong magnetic field?
200
If you put the south poles of two magnets together, this will happen.
What is they will repel?
200
This is made from wire coiled around a piece of iron. It's used at a junk yard to move cars.
What is an electromagnet?
200
This is an electric current that changes direction at regular intervals.
What is an alternating current?
200
Which type of current, alternating or direct, is used by most households and businesses?
Alternating current
200
This material was used to make the first compass.
What is lodestone?
300
This is the region where a magnetic force can be detected. You can visualize one using iron filings.
What is a magnetic field?
300
This is how the domains of a magnet are arranged.
What is aligned?
300
This device turns mechanical energy into electrical energy.
What is a generator?
300
If the primary loop has more coils of wire than the secondary loop, is it a step-up or step-down transformer?
Step-down
300
The Earth's magnetic poles are located here.
What is Canada and Antarctica?
400
This is the area where a bar magnet is the strongest.
What is at the magnetic pole?
400
This is a long, wound coil of insulated wire.
What is a solenoid?
400
This law states that an electric current can be produced in a circuit by a changing magnetic field.
What is Faraday's Law?
400
How does inserting an iron rod through the center of a solenoid increase the strength of its magnetic field?
The magnetic field of the rod adds to the coil’s field, creating a stronger magnet than the solenoid alone.
400
This is how the Bonneville Dam generates power.
What is using water to turn turbines, which rotate giant electromagnets inside coils of wire?
500
These substances, like iron, gain a magnetic field easily but also lose a field easily.
What is a soft magnetic substance?
500
If a wire was carrying an electric current straight out of the whiteboard, which direction would the magnetic field go?
What is counterclockwise?
500
This is the production of a current in a conducting circuit by a change in the strength, position, or orientation of an external magnetic field.
What is electromagnetic induction?
500
If the head of an iron nail touches a magnet, the nail will be magnetized. If the nail touches the north pole of the magnet, what kind of pole is at the point of the nail?
South
500
A transformer changes both the voltage of a current and this.