An element `Deltal = Deltax hati` is placed at the origin and carries a large current `I = 10 A` (Fig.) . What is the magnetic field on the y-axis at a distance of `0.5m. Deltax = 1cm`.

Explanation

`dB=(mu_(0))/(4pi)(I(vec(dl)xxvecr))/(r^(3))`
`=(10^(-7)xx10xx10^(-2))/(25xx10^(-2))hatk`
`4xx10^(-8)T(hatk)`