A binary digit, characterized as 0 and 1, is used to represent information in classical computers. A binary digit can represent up to one bit of Shannon information, where a bit is the basic unit of information. However, in this article, the word bit is synonymous with binary digit.
In classical computer technologies, a processed bit is implemented by one of two levels of low DC voltage, and whilst switching from one of these two levels to the other, a so-called forbidden zone must be passed as fast as possible, as electrical voltage cannot change from one level to another instantaneously.
There are two possible outcomes for the measurement of a qubit—usually taken to have the value "0" and "1", like a bit or binary digit. However, whereas the state of a bit can only be either 0 or 1, the general state of a qubit according to quantum mechanics can be a coherent superposition of both.[2] Moreover, whereas a measurement of a classical bit would not disturb its state, a measurement of a qubit would destroy its coherence and irrevocably disturb the superposition state. It is possible to fully encode one bit in one qubit. However, a qubit can hold more information, e.g. up to two bits using superdense coding.
For a system of n components, a complete description of its state in classical physics requires only n bits, whereas in quantum physics it requires 2n−1 complex numbers.
See discussion at Quantum Computing Stack Exchange:
https://quantumcomputing.stackexchange.com/questions/112/what-is-the-difference-between-a-qubit-and-classical-bit
In quantum computing, a qubit (/ˈkjuːbɪt/) or quantum bit (sometimes qbit) is the basic unit of quantum information—the quantum version of the classical binary bit physically realized with a two-state device. A qubit is a two-state (or two-level) quantum-mechanical system, one of the simplest quantum systems displaying the peculiarity of quantum mechanics.
For more information https://en.wikipedia.org/wiki/Qubit
Whereas , label, binary, or naming, and combined with tags (in English: bit) In computers, information is stored and processed in the form of bits, thus theoretically the bit is the smallest unit that carries or transmits information. The term bit refers to numbers in the Binary Digit system, which is the basic unit of the amount of information in computers and digital communications. This unit can only contain one of two values and is therefore physically applied in a two-state machine. These two conditions are represented by 0 or 1. It can also be understood as two boolean values (true or false), (yes or no), on / off or any other feature with two values. The compatibility of these two values and the physical state of the machine is a matter of proportionality. Multiple assignments of these two values can be made through the same machine or software.
Dear Firas Nadheer,
List of articles that explains the difference between bit and qubit.
I hope the information will help you.
With Best Wishes,
Samir G Pandya