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Ask iit jee aieee pet cbse icse state board experts Expert Question: variable resistance
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ambareesh13 (226)

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solve hc verma q 10 pg 198refer for figure in the book (electric current in conductors)
i want the detailed soln
thanx in advance


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ambareesh13 (226)

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why isnt anyone replying????


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obaid007in (20)

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hey  i m realy sry 4 wht i did ! it wont be repeated agan!

work hard to attain success!
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ambareesh13 (226)

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j


you are in the competition to beat the competition
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waterdemon (5150)

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Obaid007

Hey dude why don't u log onto Orkut if u just want to do this.

If this is what u have come here for then plZ join orkut.

This place is for solving doubts for others and practicing

Your concepts. Get lost !!!!!!!!!!!!!!!

And ambareesh I suggest u do be away from such people.
Cheers !!!!!!!!!!!!!!!!!!! :-)

Always available for help !

But Remember Don't hesitate to ask a good Question but
Be damn serious for Questioning a weak one.







<TABLE CELLSPACING="1" CELLPADDING="1" BORDER="0">
<TR><TD>


<DIV ALIGN="right">Glitter Graphics</DIV></TD></TR></TABLE>







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ambareesh13 (226)

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yeh i thought first but if anyone goes after my family .i aint goin to leave them .....what would have you done if you were me??

you are in the competition to beat the competition
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waterdemon (5150)

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I Have attached the diagram along with this for explanation
 
Ther is a ring with a small element .
 
resistivity =
 
Taking (b-a) << L
 
R = L / A
 
R =  (x /  r2)
 
R (Eq) =  R
 
R (Eq) = [0 ][L ]  dx /  r2
 
Tan  = (b-a)/L
 
Above "r" = a + xTan
 
R (Eq) =   dx /  (a+ xTan)2
 
R (Eq) = ( /  Tan) [ 1 / (a + xTan)] From 0 to L
 
R (Eq) =  /  Tan  [ 1 /( a + xTan)]  From 0To L
 
Therefore From above Tan = (b-a)/L
 
R (Eq) =  /  Tan [ (-1 / a) + (1/ a + b - a )
 
R (Eq) =  /  Tan ( b - a / ab )
 
R (Eq) = [ /  (b - a)] * [(b -a) / ab]
 
(b - a) gets cancelled and we get
 
R (Eq) = L /  ab
 
Hence solved
 
plZ rate me for my efforts.
 
Cheers !!!!!!!!!!!!!!@@@@@@@@!!!!!!!!!!!!!!!!!!!!!!!!!
 
As Tan = (b-a) / L and (b-a


Always available for help !

But Remember Don't hesitate to ask a good Question but
Be damn serious for Questioning a weak one.







<TABLE CELLSPACING="1" CELLPADDING="1" BORDER="0">
<TR><TD>


<DIV ALIGN="right">Glitter Graphics</DIV></TD></TR></TABLE>







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Admin (1049)

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dear ambareesh13 ,

if people are putting so much effort to reply, pleazzz put up the question as well, else the context is lost when everyone doesnt have the book while accessing the web.

thats why there was no expert reply till now.

cheers
~admin

God is real, unless declared as Integer!!
Congrats to the crackers... All the best for re-trials (it takes more courage and u guys deserve a lot more accolades) .. cheers!


Welcome our latest moderators magiclko , greatdreams , spideyunlimited and bhupesh
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obaid007in (20)

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hey i m extremly sry! i was jst joking! i assure u this will nt be repeated!! thnx a lot 4 correctng me! 

work hard to attain success!
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