Magnets and Magnetism
Magnetism from Electricity
Electricity from Magnetism
Other
Transformers
100
any material that attracts iron or materials containing iron
What is a magnet?
100
the interaction between electricity and magnetism
What is electromagnetism?
100
the number of loops on the primary and secondary coils
What determines if a transformer increases or decreases voltage?
100
The arrangement of the domains determines if the object is magnetic or not
Iron, nickel, and cobalt have atoms arranged into domains. How do these domains effect magnetism?
100
a device that increases or decreases the voltage of an alternating current
What is a transformer?
200
one of two points, such as the ends of a magnet, that have opposing magnetic qualities
What is a magnetic pole?
200
a coil of wire with an electric current in it
What is a solenoid?
200
the process of creating a current in a circuit by changing a magnetic field
What is electromagnetic induction?
200
an electric current
Faraday used an iron ring with to coils to try and induce what in the second wire?
200
it increases the voltage and decreases the current
What does a step-up transformer do to the voltage of an alternating current?
300
the force of attraction or repulsion generated by moving or spinning electric charges
What is magnetic force?
300
a coil that has a soft iron core and that acts as a magnet when an electric current is in the coil
What is an electromagnet?
300
a device that converts mechanical energy into electrical energy
What is an electric generator?
300
that he could induce an electric current but only when the magnetic field was changing
Faraday's experiment was a partial success because he discovered what?
300
it decreases voltage and increases current
What does a step-down transformer do to the voltage of and alternating current?
400
when an electric current changes its direction then it is an alternating current
How can you tell if an electric current is an alternating current of a direct current?
400
a device that converts electrical energy into mechanical energy
What is an electric motor?
400
two coils of wire wrapped around an iron ring, with one attached to a power source
What is a simple transformer made up of?
400
change direction
alternating currents always what?
400
the secondary coil has more loops
In a step-up transformer, does the primary coil have more loops or does the secondary coil?
500
when the magnetic field is changing
When is the only time a magnetic field can generate an electric current?
500
lines drawn from the north pole to the south pole of a magnet
What are magnetic field lines?
500
an electric field
Electric currents can produce what?
500
three times
About how many times is energy transformed before it reaches your house?
500
the primary coil has more loops
In a step-down transformer, does the primary coil have more loops or does the secondary coil?
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