Download Electromagnetism and Magnetic Induction

Electromagnetism
By Tyler Trodden and Dylan Tragni
What is Electromagnetism?
• Electromagnetism is one of the four
fundamental interactions of nature, along
with strong interaction, weak interaction and
gravitation. It is the force that causes the
interaction between electrically charged
particles; the areas in which this happens are
called electromagnetic fields.
Information
• Electric charges attract or repel one another
with a force inversely proportional to the
square of the distance between them: unlike
charges attract, like ones repel.
The Left Hand Rule
• The first left hand rule is a method you can use to determine the direction
of conventional current. Keep your thumb pointed in the direction of
conventional current.
How to:
• Using your left-hand:
Curl your fingers into a half-circle around the wire,
they point in the direction of the magnetic field, B
Point your thumb in the direction of the conventional
current.
• The First finger represents the direction of the
magnetic Field. (north to south)
• The Second finger represents the direction of the
Current.
• The Thumb represents the direction of the Thrust or
resultant Motion.
Examples
• http://www.stmary.ws/highschool/physics/ho
me/animations3/magnetism/1stLeftHandRule
.html
• Http://www.stmary.ws/highschool/physics/ho
me/animations3/magnetism/2nd_left_rule.ht
ml
• http://www.stmary.ws/highschool/physics/ho
me/animations3/magnetism/3rd_left_rule.ht
ml
Definitions
• Solenoid- a long coil of wire consisting of
many loops.
• Electromagnet- the current carrying coil which
has a north and south pole.
The Easy Test
1) A long coil of wire consisting of many loops is a
2) The current carrying coil which has a north and south
pole is
3) One of the four fundamental interactions of nature,
along with strong interaction, weak interaction and
gravitation is
4) A method you can use to determine the direction of
conventional current is called the
5) Represents the direction of the thrust or resultant
motion is the
Quiz
• http://www.stmary.ws/highschool/physics/ho
me/marys_java/magnetism/MagnetismQ.htm
l
Bibliography
•
•
•
•
St. Mary’s Physics
Textbook
Wikipedia
Google Images
Electromagnetism and Magnetic
Induction
By Tom Sullivan and Steve Lyons
The Basics of Magnetic Induction
• Technical Details
• Uses of Magnetic Induction in Applications
Technical Details
• Magnetic Induction is the production of *voltage across a
conductor situated in a changing magnetic field or a
stationary magnetic field*.
• *Magnetic fields are associated with magnets.*
• An electric current will be induced in any closed circuit
when the magnetic flux through a surface bounded by the
conductor changes.
Uses of Magnetic Induction in
Applications
•
•
•
•
•
Induction Sealing
Electrical Generators
Transformers
Contactless recharging of batteries
Faraday Flashlight (Faraday was a physicist and
chemist. He discovered the induction phenomenon in
*1831*.)
• Graphics Tablet
• Clamp Meter
Quiz
3. Magnetic fields are associated with _______.
4. Magnetic Induction is the production of
________.
5. Michael Faraday discovered the induction
phenomenon in ____. (Hint: minus 1111 from
2942)
Quiz Answers
• 3.) Magnets
• 4.) Voltage across a conductor situated in a
changing magnetic field or a stationary
magnetic field
• 5.) 1831