Question 7 Give an example of a device where we can find a s

Question 7 Give an example of a device where we can find a slope of electrostatic potential without a current flow. Explain your answer American University Of The Middle East 8 Draw and explain the spin of an electron. 9 Draw a spin valve and explain all the mechanisms of current flow through it 10 How can we change the resistance of the spin valve?

Solution

Answer to Question 7.

A p-n junction diode is a device which exhibits a slope in electric potential (i.e presence of an Electric Field) without any current flow. This happens when the device is in reverse biased. The entire applied voltage drops across the reverse junction with hardly any current flow.