Module 3 : MAGNETIC FIELD
Lecture 15 : Biot- Savarts' Law
The expression for field at a point P having a position vector $\vec r$with respect to the current element is
 
\includegraphics{fig3.16.eps}
  For a conducting wire of arbitrary shape, the field is obtained by vectorially adding the contributions due to such current elements as per superposition principle,  \begin{displaymath}\vec B(P) = \frac{\mu_0}{4\pi}I\int\frac{\vec{dl}\times\hat r}{r^2}\end{displaymath}  where the integration is along the path of the current flow.
 

Example 5    Exercise 1    Example 6   Example 7  Exercise 2   Example 8  Example 9  Example 10

  Example 11   Exercise 3
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