Complex sentence: Powerful superconducting electromagnets, necessary to contain hot plasma, generate tesla-range magnetic fields, That can cause problems with other onboard devices and produce unwanted torque by interaction with the magnetosphere.
Split into simpler sentences: Powerful superconducting electromagnets, employed to contain hot plasma, generate tesla-range magnetic fields. They can present problems with other onboard devices and can produce unwanted torque by interacting with the magnetosphere.