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Ask iit jee aieee pet cbse icse state board community Community Discussion Question: Easy magnetism question::::::::::::::::::::::
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Ronaldooo (44)

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Current i=2.5A flows along the circle x2+y2=9cm2(here x and y are in cm).Magnetic field at point (0,0,4cm) is??
I think we have to use the formula for magnetic field along the axis of a circular ring.But answer is coming out to be (9/25)(pie)(10-7) but answer is given something else.Plzz tell me where i am wrong.(Maybe a calc. error,plz chk that too:))

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srini (305)

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Hey,
It is
          4pi*9*10^-7*2.5/(2*125*10^-2).

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Ronaldooo (44)

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How??Can u plzzz elaborate???

Please watch the BPL match between ManUtd and Arsenal on Sunday at 5:55pm and support only ManUtd...for BPL lovers,update:ManUtd-2 Arsenal-1...
Viva Ronaldoooo
Viva Ronaldoooo
Viva Ronaldoooo
Running down the wing,
Hear United sing,
Viva Ronaldoooo.
-United supporters new chant!!!
Team Plyd Pts
United 32 76
Cls 32 71
Arse 32 70
Who are Liverpool?????
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srini (305)

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Hey,
  
B=mu/4pi   [R^2]/2(R^2+X^2]^3/2
Here, x=4
 
 
4pi*9*10^-7/(2*125*10^-2))
 

GIVE LIFE THE BEST....srini...
DO OR DIE, OR BETTER NEVER TRY!!
I dont want to be the most intelligent among the ten.i pray the other nine RE fools!???!!!!!!
it doesn't matter if you win... whats important to me is i win!!!!!!!!
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Ronaldooo (44)

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But answer is given as 36pie*10^-7...

Please watch the BPL match between ManUtd and Arsenal on Sunday at 5:55pm and support only ManUtd...for BPL lovers,update:ManUtd-2 Arsenal-1...
Viva Ronaldoooo
Viva Ronaldoooo
Viva Ronaldoooo
Running down the wing,
Hear United sing,
Viva Ronaldoooo.
-United supporters new chant!!!
Team Plyd Pts
United 32 76
Cls 32 71
Arse 32 70
Who are Liverpool?????
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Ronaldooo (44)

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Someone!!!!!

Please watch the BPL match between ManUtd and Arsenal on Sunday at 5:55pm and support only ManUtd...for BPL lovers,update:ManUtd-2 Arsenal-1...
Viva Ronaldoooo
Viva Ronaldoooo
Viva Ronaldoooo
Running down the wing,
Hear United sing,
Viva Ronaldoooo.
-United supporters new chant!!!
Team Plyd Pts
United 32 76
Cls 32 71
Arse 32 70
Who are Liverpool?????
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Ronaldooo (44)

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Is this question so difficult????

Please watch the BPL match between ManUtd and Arsenal on Sunday at 5:55pm and support only ManUtd...for BPL lovers,update:ManUtd-2 Arsenal-1...
Viva Ronaldoooo
Viva Ronaldoooo
Viva Ronaldoooo
Running down the wing,
Hear United sing,
Viva Ronaldoooo.
-United supporters new chant!!!
Team Plyd Pts
United 32 76
Cls 32 71
Arse 32 70
Who are Liverpool?????
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karthik2007 (3349)

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Please check your calculations. The formula to be used, is as you said, for the magnetic field along the axis of a circular loop.

Will nip in at times to solve problems :)
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