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A very long straight wire carrying a 4-a current is placed along the x-axis.due to this wire, what isthe magnitude and direction of the magnetic field at a point p on the y axis at y = 2.0 cm?



Answer :

shaikhmohd0119

The magnitude is 4×10⁻⁵T and direction of the magnetic field at a point p is -z axis.

we know that magnetic field due to a long straight wire at a point perpendicular to it is given by

B=(μ°I)/2πR

μ°= 4π×10⁻⁷Hm⁻¹

R=2cm

I=4A

on substituting value we get

B=(4π×10⁻⁷×4)/2π×2×10⁻²

B=4×10⁻⁵T

the direction will be along negative Z axis, outside the plane

learn more about magnetic field due a long straight wire here:

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