Question

A current runs through a wire in the +y direction along the y-axis. What is the direction of the magnetic field at a point (x,y,z) = (0,0,1.045 m)

Answer 1

Magnetic field at given point is along + x direction

Step-by-step explanation:

As we know that position of the wire is along Y axis

current is flowing along +y direction

so here we will have

`\vec B = \frac{\mu_0 i (\vec {dl} * \hat r)}{4\pi r^2}`

now the direction of length vector is along +Y direction

also the position vector is given as

`\hat r = \hat k`

now for the direction of magnetic field we can say

`\vec B = (\hat j * \hat k)`

`\vec B = \hat i`

so magnetic field is along +X direction