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Electrodynamics - Summary
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  • Course
  • Physical Sciences
  • Institution
  • 12th Grade

Grasp the complexities of electrodynamics with these structured notes. From electric fields to electromagnetic induction, this guide offers detailed explanations and practical examples for easy learning. Contains many examples and diagrams making learning easy.

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Document information

  • September 24, 2024
  • 13
  • 2019/2020
  • Summary

Subjects

  • electrodynamics

Written for

  • 12th Grade
  • Physical Sciences
  • 200
All documents for this subject (621)

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Content preview

ELECTRODYNAMICS
MAGNETIC FIELDS

RIGHT HAND THUMB RULE

"""""
"" ""




Papis
" " " " " " "" " " " "" "




¥¥¥% ni

⑧
""" t "




••;÷÷"
"" " " " on "




FLEMINGS LEFT HAND MOTOR RULE

fodnatuofjpnd
" the direction of the force on a current -


carrying
SINGLE LOOP OF WIRE
T Force ( F)




i Recurrent
"
magnetic.ci

.

SOLENOID




ion
"




ELECTROMAGNET
-
on
.÷÷E⇐÷i÷÷
FACTORS AFFECTING THE SHE
RRCE
O ON THE




" " " " " " " " "" "" "
÷÷÷÷÷:÷÷÷÷÷÷÷i÷ .




=

, DC MOTOR
convert electrical energy into mechanical energy



CLOCKWISE

@ F-


Ts

E¥tFtF¥
N
/
y s

#
x
. . a-


-
g-
N S Function of a split ring commutator in
ambo for


T④④ • reverse the direction of the current in the




↳#
every half revolution ( 180
-


coil rev )
SPLIT RING me
dinette
• Ensures the coil continues to spin

I
,
-1 COMMUTATOR

SOURCE #

Nt#
DC
s
a-
-

ELECTROMAGNETIC INDUCTION

Wb AREA
-




Q = BA cos O
marine mi:*.
age;¥:*;
"




= ,
Flux through SA of coil M ( count field lines )
t

as the magnet approaches the coli




&
t
f



µq
changing induces an em



Ifa't
→ slope
-
'

.
induced a current -




Magnetic flux density ( B) is a representation of




¥
the magn 8 direction of MF
" E
.



- -
'




t
µ

FARADAY 'S LAW
.




induced
eme.in#iIOin:nn..e
Dt
. ..


its E its ⇐ its
Cmf
0 Max o
ft EI Efts
o max

current induced Is proportional to RATE OF CHANGE OF FLUX
NOT magnitude of flux




If
a. in:*.is :* : ::i:::::i: inanimate
" ""

.mn .




LENZ 'S LAW
induced current flows direction so as to
The in a set up a
magnetic
field to oppose the the change in the magnetic flux

C- = IR
I = E
a

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