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@amistre64 @Callisto please help...

@UnkleRhaukus @experimentX help..

???????

can you draw the picture??

they havent given one but wait i'll try...

So, okay, I got wire A 'square' and wire B 'circle' right?|dw:1342104894718:dw|

yeah...

are those independent??

and R=L/2pi ?rite?

yeah....

yes, radius 'r' for loop 'B' = L/2pi

Now, magnetic field for A at O = 4 x \(\mu_oI/(L/8) \)

isnt it mu i /2pir

That's the square loop, (according to the formula -> B = \(\mu_oI/2\pi l\)

Oh yes I missed the '2pi', am sorry please account for that.

Now for the circular loop,
\[B= \mu_oI/2r\ = \mu_oI/2(L/2\pi) = \pi\mu_oI/L\]

And for the square loop, we found it out to be --> 4 x \(\mu_oI/2\pi(L/8)\) = 16\(\mu_oI/\pi L\)

so we get pi^2/16 but answer is pi ^2 /8sqrt2

even i got this answer i was wondering hw this is wrong......
:(

:__(

Lol there may just be a printing error in the book. Or. Did you copy out the question correctly?

yeah its not a book its a worksheet..okay so thnx didi!!

DIDI??? o.O *facepalm*

:D

Arey Sirji, I am a guy! (ab Bhaiya bolne ki zarurat nahi hai lekin :P )

And whatever worksheet or book, please do check out what's wrong and let us know. :]

what's the answer anyway??

@experimentX I seem to get (pi^2)/16, but his book says (pi^2)/(8sqrt2).