![An infinitely long wire parallel to the x-axis is kept at π§ = π and carries a current I in the positive x direction above a superconductor filling the region](https://www.gkseries.com/blog/wp-content/uploads/2023/09/An-infinitely-long-wire-parallel-to-the-x-axis-is-kept-at-π§-π-and-carries-a-current-I-in-the-positive-x-direction-above-a-superconductor-filling-the-region.jpg)
Q. An infinitely long wire parallel to the x-axis is kept at π§ = π and carries a current I in the positive x direction above a superconductor filling the region π§ β€ 0 (see figure). The magnetic Β field Β π΅ββΒ Β inside Β the Β superconductor Β is Β zero Β so Β that Β the Β field Β just Β outside Β the superconductor is parallel to its surface. The magnetic field due to this configuration at a point (π₯, π¦, π§ > 0) is
![](https://www.gkseries.com/blog/wp-content/uploads/2023/09/image-22.png)
![](https://www.gkseries.com/blog/wp-content/uploads/2023/09/Screenshot-784.png)
Ans: Option B
Sol:
![](https://www.gkseries.com/blog/wp-content/uploads/2023/09/Screenshot-785.png)