Transistors are electronic switches that may or may not allow the flow of current in a current path.

★ When it allows current to flow, the switch is ON. This represents 1 bit.

★ When it does not allow current to flow, the switch is OFF. This represents 0 bit.

★ Transistors are placed into chips also known as IC. They measure in mm`s and are known contain millions of transistors.

★ Microprocessors these days are created using microns as their measuring size.