investigatory physics

7/25/2019 Investigatory Physics

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GROUP

MEMBERS:

FARZEEna v l

Aparna v k


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THEORY


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Diamagnetic material

#n t*e a'ence o2

appl!ed magnet!c 3eld4eac* atom *a' net 5ero

magnet!c d!pole

moment.)*e'e !nd$ced

magnet!c d!pole

moment' al!gn

t*em'elve' oppo'!te to

t*e appl!ed 3eld.


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)*$'4 6m 7 8 and 9r

7 1.

Paramagnetic

Materials

#n t*e a'ence o2 appl!ed

magnet!c 3eld4 eac* atom

*a' net non5ero ;$t

weak< magnet!c d!polemoment.

)*e'e magnet!c d!pole'

moment' are randoml+


6/16

or!ented 'o t*at t*e net

macro'cop!c

magnet!5at!on !' 5ero. #n t*e pre'ence o2 an

appl!ed magnet!c 3eld4

t*e magnet!c d!pole' al!gn

t*em'elve' w!t* t*e

appl!ed 2!eld 'o t*at 6m =

8 and 9r = 1.

Paramagnet!c mater!al'are ;weakl+< attracted to

e!t*er pole o2 a magnet.

Ferromagnetic

Materials


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Ferromagnet!c mater!al'

!ncl$de !ron4 n!ckel and

coalt #n t*e a'ence o2 appl!ed

magnet!c 3eld4 t*e doma!n'

are randoml+ or!ented 'o

t*at t*e net macro'cop!cmagnet!5at!on !' 5ero.

#n t*e pre'ence o2 an appl!ed

magnet!c 3eld4 t*e doma!n'

al!gn t*em'elve' w!t* t*eappl!ed 3eld.

)*e e>ect !' a ver+ 'trong

one w!t* 6m == 8 and 9r ==

1. Ferromagnet!c mater!al' are

'trongl+ attracted to e!t*er

pole o2 a magnet.


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:


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Ao$t t*e apparat$'...

Variable Gap Magnet.

)*!' apparat$' con'!'t' o2 two 8mm

d!ameter neod+m!$m magnet' 3tted on

two ad?$'tale !ron *older' on metall!c

a'e. One can ea'!l+ ad?$'t t*e 3eld

'trengt* !n etween t*e two magnet' +

?$'t rotat!ng kno' prov!ded on t*e

e@treme end'. )wo at pole p!ece' are

al'o !ncl$ded to prov!de a $n!2orm

magnet!c 3eld w*en needed.


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im


13/16

PROCED!RE

1. Ad?$'t t*e gap etween t*e pole

p!ece' to ao$t 1 mm and '$'pend

t*e 'ample o2 metal $nder

!nv!g!lat!on etween t*e'e.

". )!e p!ece' o2 t*read aro$nd t*e'ample and 'ec$re t*e t*read w!t* a

'mall p!ece o2 tape to prevent t*e

'ample 2rom 'l!pp!ng o$t o2 t*e

t*read loop.

#. ang t*e 'ample 2rom a 'tand 'o!t !' at t*e 'ame level a' t*e Car!ale

Gap Magnet w*en t*e magnet !'

placed on !t' '!de .%. are2$ll+ ad?$'t t*e po'!t!on o2

t*e 'ample '$c* t*at !t make' an

angle o2 %(D w!t* 3eld d!rect!on.(. Grad$all+ !ncrea'e t*e c$rrent

t*ro$g* t*e co!l + t$n!ng voltage

ad?$'tment kno !n t*e clockw!'e

d!rect!on.


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,. O'erve t*e e*av!o$r o2 t*e

'ample $nder o'ervat!on.

RE$!%REMENTS


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O&SERVT%ON

SMP'E &EHV%O!R OF

THE SMP'EB#SMU)

;!amagnet!

c

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