Superconducting magnets are used in machines called particle accelerators. these machines rely on zero resistance in order to function properly. how are the magnets able to have zero resistance? they are heated to extremely high temperatures. they are cooled to extremely low temperatures. they are made to be very thick. they are made to be very thin.

Zero electrical resistance is also called superconductivity. The Meissner effect states that when superconducting materials reach their critical temperature two exciting properties appear. Firstly, the electrical resistance of the material drops rapidly to zero and secondly, they become perfect diamagnets (they exclude all magnetic flux from the superconductor). Superconducting magnets are used in accelerators. These machines rely on zero resistance in order to function properly. The magnets are cooled to extremely low temperatures, below the critical point of the material at which it becomes a superconductor.

C) reflection (i also looked up the other choices just to make sure)

I'm sorry to hear that. i will try to answer your other questions if it is within my ability. : )answers: my favourite colour is black.my favourite food is pasta.my favourite school subject is english, but i do also like lunch time.my least favourite subject is history as well as geography. i have currently garnered a quite equal hatred for both of the subjects.what about you? well, you for the points. : )