41. Since the magnetic cores were open in the middle, any number of control lines could be threaded through them. 42. The end of a magnetic core from which the field lines emerge is defined to be the North pole. 43. FLAC II abandoned mercury delay line memory in favor of a faster and more versatile 4096-word magnetic core memory. 44. The only catch to the system is that is calls for very expensive pots and pans with magnetic cores . 45. This coil is usually much longer than the primary loop, accomplished by many more loops around the magnetic core . 46. The Mark IV was all ferrite magnetic core memory ( one of the first computers to do so ). 47. For example, the force of the lock is proportional to the square of the relative permeability of the magnetic core . 48. The energy stored in the magnetic core is released to the secondary as the magnetic field in the core collapses. 49. In a rotating machine, the field coils are wound on an iron magnetic core which guides the magnetic field lines. 50. The name comes from magnetic core memory, the principal form of random access memory from the 1950s to the 1970s.
