Grade 11 IEB - Electromagnetism Summary

Electromagnetism car .ae . .




Surrounding a
moving charge
is a
magnetic
field


Magnetic Field of a Solenoid

(oil of wire :
called solenoid


flows
Magnetic↳ field is
prod when .
current
through
Strength of field can be increased
by
:




Current Increase
I Coil turns Increase


Determine
polarity by :




I tff
current is clockwise = North

current is anti clockwise
- = South




flux
Magnetic flux and
Magnetic density
flux Field lines that show pattern of
Magnetic :

magnetic field
↳
Symbol :
Phi Clo )

Unit :
Webers ( Wb)


Magnetic flux
Density
↳ More
:
Indicates
magnitude t direction of
magnetic
field



↳
poles
↳ Total
dense near


nun . of field lines through area




sq: Eaa "
'




Formulae :
-




Mag . flux density :

G -
-

BA


Flux Cat
density angle ) to BA cost
-

: =




Flux linkage Prod of of turns flux
coil and
through coil
:
.

no . on



↳ Not