By Stephon Lemay amp Luz Ruiz What Is It Electromagnetism is defined as the force between electrically charged particles Electromagnetic induction Electromagnetic induction is creating an electric current from a changing magnetic ID: 273275
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Slide1
Electromagnetism/Induction
By: Stephon Lemay & Luz RuizSlide2
What Is It???
Electromagnetism is defined as the force between electrically charged particles.Slide3
Electromagnetic induction
Electromagnetic induction is creating an electric current from a changing magnetic
field
Ex
:
When a wire moves through a magnetic field, the electromagnetic effect takes place, creating an electric current through the wire.
Remember the lab we did?Slide4
Everyday usage!
Windmills
Dams
Electric motor
To control switches
On Trains
And a lot more…Slide5
Electromotive Force
The potential difference or EMF
EMF=
BLv
(sin
ø
)EMF is measured in (v) volts Slide6
Example problem of EMF
A Straight wire is part of a circuit that has a resistance (R) of 0.50o. The wire is 0.20m long ad moves at a constant speed of 7.0 m/s perpendicular to a magnetic of strength 8.0x10-2T.
What is induced in the wire?
What is the current through the wire?Slide7
What you know!
V=7.0 m/s
L=0.20 m
B=8.0x10^-2 T
R1= 0.50o
R2=0.78o
What we don’t know is what I and EMF equals..Slide8
Solving For I and EMF
EMF=
BLv
=(8.0x10^-2T)(o.20 m)(7.0 m/s)
=0.11Txm^2/s =0.11VI=EMF/R =0.11 V/ 0.78o
=0.14 A and the current is counterclockwise.