## anonymous 3 years ago How to determine the magnetic field due to a straight current-carrying conductor of finite size?

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1. anonymous

Integrate Biot & Savart law.

2. anonymous

The magnetic field due dB due to an element dL carrying a steady current I at a point P at a distance r from the current element is $dB=(\mu0/4\pi) I *((dL*r)/r ^{3}))$

3. anonymous

How about a conductor of finite size?

4. anonymous

Integrate this vector expresion

5. anonymous

There is another one...The magnitude of the mag field at a distance R from a long straight wire carrying a current I is given by $B=\mu0I/2\Pi r$

6. anonymous

But this is the result for a wire of infinite length..

7. anonymous

I am asking for finite length..

8. anonymous

|dw:1359312769537:dw| then magnetic field at point p is given by$B = \mu o I/4 \pi r ( \sin a + \sin b )$