Question

What is an unbiased diode?

Answer 1

1. When there is no contact with any of the terminals of the battery is called an unbiased diode.
2. The electric field is set up across the depletion layer between p-type and n-type material.
3. This is caused due to doping due to the imbalance of free electrons.
4. 
5. For a silicon diode, barrier potential is approximately $0.7V$ at room temperature.