Becauae ferrites can be magnetized in either of two directions by an electric current, which makes them capable of storing binary bits of information even in small quantities
Ferrite is a hard magnetic materials and it’s magnetized either in two directions. lt consists of thousands of arrays tiny rings called cores produce toroid's(ring). It can be easily assembled into a central memory array, in the remaining magnetic fields. The two directions can represent either of the values, 0 or 1, in a binary bit.