1)a long straight wire carries a current i.let B1 b the magnetic field at a pointt P at a distance "d"
frm the wire ..consider a sec of length "l" of this wire such that point P lies on perpendicular bisector of the section ..let B2 b the magnitude of magnetic field at this point due 2 this sec only.find the value of "d/l" so that B2 differs by B1 only by 1% ..
2>a long wire carrying a current i is bent 2 form a plane angle ∂ .find the magnetic field Bat a point on the bisector of this angle situated at a dist "X" frm the vertex..
plzzzzz hlp.....
71Hints: Make use of Biot Savart Law ,and then the formula due to long CC wire fora point at distance d = μ04Πd (sin α+sin β)
Where angles are measure from the perpendicular line on long CC wire from point P.
You would find these in any book.. or even can derive it.
Now solve.
