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iz'u 5% &eSXusV ds fyf¶Vax ikWoj d¨ le>kb, A
mÙkj 5% &eSXusV dh Dokby e— LV¨j ,utË ds cjkcj eSXusV dk
fyf¶Vax ikWoj g¨rk gS A eSXusV e— LVksj ,utË eSXusV dh Dokby dh VuZ dh
la[;k N] Dokby ds baMDV®l
L
v©j Dokby e— izokfgr g¨ jgs djaV ds eku
I ij fuHkZj
djrh gS A LV¨j ,utË Kkr djus dk lw= gS%
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LV¨j ,utË |
= |
1/2 L I2 |
|
Since L |
= |
(N
f) / I |
|
f |
= |
¶yDl |
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LV¨j ,utË |
= |
1/2 {(N
f)/I} I2 |
|
LV¨j ,utË |
= |
1/2NIf……joules |
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Since NI |
= |
HLn |
|
H |
= |
Field strength |
|
Ln |
= |
Length of magnetic field in meter |
|
LV¨j ,utË |
= |
1/2(HLn)
f |
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Since
f |
= |
B A |
|
B |
= |
Flux density. |
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A |
= |
Area of cross section of magnet in m2 |
|
LV¨j ,utË |
= |
1/2(HLn)(BA) |
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Since Ln
A |
= |
V=Volume of the magnetic field in m3 |
|
LV¨j ,utË |
= |
1/2HBV |
|
LV¨j ,utË |
= |
1/2HB joules per
cubic meter of field. |
|
Since H |
= |
B /
m0m r |
|
m0 |
= |
Absolute permeability. |
|
m
r |
= |
Relative permeability. |
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LV¨j ,utË |
= |
1/2
m0 m
r
H2
joules/m3 |
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;k LV¨j ,utË |
= |
1/2
m0 m
r
{B2 / (m0mr)2} |
|
LV¨j ,utË |
= |
1/2 B2
/
m0mr=B2 / (2m0mr) joules/m3 |
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