Figure shows a long wire bent at the middle to form a right angle. Show that the magnitudes of the magnetic field at point P, Q,R and S are equal and find this magnitude.

Figure shows a long wire bent at the middle to form a right angle. Sho

1.	Figure shows a long wire bent at the middle to form a right angle. Show that the magnitudes of the magnetic field at point P, Q,R and S are equal and find this magnitude.
Answer» `\|B_P\|=(mu_0i)/(4pid), \|B_R\|=(mu_0i)/(4pid)` At P and R, the field due to vetical part is zero and the points are equidistant form the horizontal wire. Similarly, the point S and Q are equidistant from the vertical wire and field due to horizontal wire is zero. Hence `\|B_Q\|=\|B_S\|=(mu_0i)/(4pid)` `implies \|B_P\|=\|B_Q\|=\|B_R\|=\|B_S\|=(mu_0i)/(4pid)`

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