Physics - Magnetism Question with Solution | TestHub

$-\frac{{\mu }_{0}I}{8\pi a}\left(\widehat{\text{i}}+\widehat{\text{k}}\right)$

$\frac{{\mu }_{0}I}{2\pi a}\left(\widehat{\text{i}}+\widehat{\text{k}}\right)$

$\frac{{\mu }_{0}I}{8\pi a}\left(-\widehat{\text{i}}+\widehat{\text{k}}\right)$

$\frac{{\mu }_{0}1}{4\pi a\sqrt{2}}\left(\widehat{\text{i}}-\widehat{\text{k}}\right)$