What happens to the thickness of the depletion layer in p-n junciton when reverse bias is increased?

Why does the thickness of depletion layer of pn-junction increases in reverse biasing ? Draw the circuit diagram of reverse biasing.

How does the width of the depletion region of a p-n junction vary if the reverse bias applied to it decreases?

What is the order of depletion layer width?

Explain how the width of depletion layer in p-n junction diode changes when the junction is reverse biased.