In a binary system, which digit accurately represents off?

In a binary system, the representation of states is based on two possible values: 0 and 1. The digit '0' is used to indicate the "off" state, while the digit '1' indicates the "on" state. This binary system is fundamental to digital electronics, computing, and various forms of data transmission and processing.

Using '0' to signify "off" aligns with how binary values function in logic gates and programming, where binary digits correspond to true/false values, or logical states. In contrast, other options like '1', '2', or 'Negative' either do not fit into the binary mold or are not applicable states in this context. Therefore, '0' is the correct choice for representing the "off" state in a binary system.