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Blazing goIITian

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11 Jul 2009 11:28:14 IST

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Q. A hypothetical magnetic field existing in a region is given by B = B 0 e r where e r denot

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Q. A hypothetical magnetic field existing in a region is given by B = B₀e_r where e_r denotes the unit vector along the radial direction. A circular loop of radius a , carrying current , is placed with its plane || to the X - Y plane and the centre is at ( 0 , 0 , d ). Find the magnitude of the magnetic force acting on the loop.

Is this physically possible ?

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Comments (13)

ramyani chakrabarty

Blazing goIITian

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12 Jul 2009 00:28:23 IST

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come on.

adi

Blazing goIITian

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12 Jul 2009 00:34:01 IST

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wait a minute tryin

adi

Blazing goIITian

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12 Jul 2009 00:35:39 IST

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0...it will try 2 stretch

adi

Blazing goIITian

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12 Jul 2009 00:39:02 IST

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plz reply

ramyani chakrabarty

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12 Jul 2009 00:49:45 IST

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adi

Blazing goIITian

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12 Jul 2009 00:50:53 IST

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isn the net force 0

adi

Blazing goIITian

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12 Jul 2009 01:01:27 IST

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am sorry the answer now comes out to be (2B pi a^2)/sqrt(a^2+d^2) in + z direction

adi

Blazing goIITian

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12 Jul 2009 02:02:41 IST

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am sorry the answer now comes out to be (2B pi a^2)/sqrt(a^2+d^2) in + z direction

ramyani chakrabarty

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12 Jul 2009 12:34:13 IST

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according to Maxwell's eqn

div B = 0

But for B = B₀ e_r we have div B = 2 B / r which is non zero everywhere .

ramyani chakrabarty

Blazing goIITian

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14 Jul 2009 01:38:17 IST

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so such field is not possible anywhere.

adi

Blazing goIITian

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14 Jul 2009 01:39:01 IST

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the net force is (2B pi a^2)/sqrt(a^2+d^2) in + z direction

adi

Blazing goIITian

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14 Jul 2009 01:40:14 IST

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first i thought its 0...but later found out that integral one componenet gives 0..other gives(2B pi a^2)/sqrt(a^2+d^2) in + z direction

adi

Blazing goIITian

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14 Jul 2009 01:41:00 IST

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*i ofcourse

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