A wire with a total length l is used to form a circular loop with radius r and then connected to an ideal battery such that it creates a magnetic field with magnitude B$1$ at the loops center. If a wire with a total length of $2$l but otherwise identical to the first is used form a circular loop and connected to an ideal batery such that it has the same current through it$,$ what is the magnitude of the magnetic field at the center of the second loop?$\text{'}$