A diode is a two-terminal electronic component with a low resistance to current flow in one direction, allowing current to flow in that direction, but a high resistance in the other way, preventing current flow in that direction.
Semiconductor diodes are two-terminal devices with tangency and light contacts on both ends.
The accompanying diagram depicts the P-N junction in physics.
A chemical element silicon diode has a forward voltage of around volts, while a Ge diode has a forward voltage of around volts.
In a reverse bias, the highest peak inverse voltage is the maximum voltage the diode can tolerate without breaking down.
volts is the voltage difference between the two terminals.
To conduct current, chemical element diodes require a lot of voltage; a forward-bias scenario in a silicon element diode requires only volts.