Yes they can be used to make a multistage electromagnetic pulse device but room temperature superconductors wouldn't really make it that much easier. Definitely

Yes they can be used to make a multistage electromagnetic pulse device but room temperature superconductors wouldn't really make it that much easier. Definitely not easy enough for a non-state actor to make one. The amount of current generated during the first stage of an EMP detonation is so high it ablates the coil away, which wouldn't happen with superconducting wires. However, it wouldn't protect it against the explosive used to generate the magnetic field, which is the biggest challenge.