List of top Physics Questions on Magnetic Field Due To A Current Element, Biot-Savart Law asked in JEE Advanced

In the following hexagons made up of two different material P and Q, current enters and leave from points  X and Y respectively.In which case the magnetic field its center is not zero

Two infinitely long straight wires lie in the $xy$-plane along the lines $x = \pm R$. The wire located at $x = + R$ carries a constant current $I_1$ and the wire located at $x = - R $ carries a constant current $I_2$. A circular loop of radius