Download Generating Electricity Part 2, and Magnetism

Name: ______________________
Electricity and Magnetism
Magnetic fields are a naturally occurring phenomenon.
Magnetism exists in a constant form known as _________________________________
or as an ___________________________________.
Magnetic fields are oriented by using the terms ______________ and
________________ to identify the lines of flux.
___________________________ exit in a pattern surrounding a magnetized substance or
permanent magnet itself.
These principals are commonly seen our modern day navigation systems which are
oriented __________________________________________________________.
Magnetic Lines of flux are __________________________________________________
with a polarity of N to S travel in constant __________________________ to one and
other.
Unlike Poles _________________, Like poles _______________________
Magnetic Fields (Lines of flux) can be ______________________________with
substances that have high ___________________________________ – substances
usually containing __________________________.
_____________________________________ are used to increase the
______________________ of magnetic fields needed to operate/generate electrical
signals or electricity itself.
Remember that a byproduct of current is ____________________. Every
__________________ carrying conductor produces magnetic lines of flux.
To demonstrate the effect of current flowing in a conductor, we use the
_____________________________________________ which mirrors the direction of
____________________________________ pointing with the thumb, followed by the
_________________________________ surrounding the conductor shown by fingers
wrapping around the conductor.
By using the magnetic field produced by a current carrying wire, magnetism can be
_________________________________________ object, therefore making it a magnet.
Simply by increasing the ____________________________ within a wire we can
________________________ magnetic strength, additionally, increasing the number of
______________________ of wire increases magnetic strength.
Not only does current produce magnetism but a magnetic field can produce
__________________________________. This is called ________________________.
To induce current into a wire, it must be passed ________________________________.
To induce an adequate current, the wire must cross the lines of flux at a
______________________________________.
The factors effecting induction are ___________________________,
___________________________, and _____________________________.
To create an electromagnet, simply wind a coil of wire around a
_____________________ object and apply _____________________ to the wire. This
creates a magnetic field which increases in concentration until it reaches its
___________________________________. When the current is removed the magnetic
field quickly __________________.
To produce work with an electromagnet, a ______________________ is a perfect
example. A ______________ of wire is wrapped around a moveable permeable object
under spring tension. When current is applied, the magnetic field
____________________ the permeability of the iron core and draws it ______________.
This mechanical movement can be used to activate __________________________ or
______________________ or __________________________.
The same principal is used with an __________________________. The electromagnetic
fields produced by windings of wire _________________ and _________________ to
rotate permeable object to make it spin, such as a _______________________________.