ElectricChargesandfields *E
Eaxial
2
or
Eeg
s
EA
"ยฅ
.=
-
83
"ยฅ
-
-
-E
=
UR*
--
Er2
AE
r
=
R
rCR
i
r
>
R
Distance"
fromCentre(r)
ElectricPotential
and
Capacitance
E
=
Er
11
=
1-
4
TE
CurrentElectricity
John
Law
Y
=
iR.
CH-4
A
changes
and
Magnetism
Magneticfield
on
theaxisof
a
circularcurrentloop
B=
MR
R
=
Radius
2(x
+
RY32
Beentre
We
B
=
M KayBCIAy
Bar
2sTr B
=
(Y)
O
...
is
....
BA-
..ot...."
I
Bat
P
r
DiamagneticParamagneticFerromagnetic
Xm=
small-ve
Rm-small
the
Xit
very
large,
&mA
XmTo
&m
positive
andtemp.
dependent.Xm XmT
8T
Xm*
I
CH
=
5
XT
n
T
I
Magnetism
&Mattel Tc
=
CurieTemp.
CH-6
Electromagneticinduction
2
=
2.since
Ch-7
Alternating
current
voltageApplied
to
a
ResistorvoltageApplied
to
a
inductor
only
x
=
Yosincot
I
=
Isincot
x
=
vosinct
I
=
I.Sin(wt-,/2)
voltageapplied
toCapacitoronly
x
=
Vosincot
I=
Isin(ct+,/z)