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An electric current I flows through an i...

An electric current I flows through an infinitely long conductor as shown in Figure 2(a) below. Write an expression and direction for the magnetic field at point P.

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`therefore` By Biot Savart.s law
`vec(B)= int d vec(B) = (mu_(0))/(4pi) int (I vec(dl) xx vec(r ))/(r^(3))`

The magnetic field created by a current carrying wire is radial magnetic field.
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