10 Questions
What is the primary reason that continuous atomic-level contact is not possible in any crystal, no matter how smooth?
The inter-atomic spacing is much larger than the atomic diameter, making the surface inherently rough at the atomic scale.
How does the applied voltage affect the height of the potential barrier in a p-n junction diode under forward bias?
The applied voltage decreases the height of the potential barrier, making it easier for charge carriers to cross the junction.
What is the primary mechanism for the flow of electric current in a p-n junction diode under forward bias?
The injection of minority charge carriers across the junction.
What is the relationship between the applied voltage and the width of the depletion region in a p-n junction diode under reverse bias?
The applied voltage increases the width of the depletion region.
What is the primary purpose of the metallic contacts attached to the ends of a semiconductor diode?
To provide a means of applying an external voltage to the diode.
What is the primary function of the depletion region in a p-n junction?
To create a barrier potential that impedes the flow of charge carriers
Under what condition does a p-n junction allow the flow of significant current?
When it is forward-biased with a small voltage
Which factor primarily determines the barrier potential in a p-n junction formed by different semiconductor materials?
The type of semiconductor material used (e.g., Si, Ge, C)
What is the primary mechanism responsible for the movement of charge carriers in a p-n junction under equilibrium conditions?
Diffusion due to concentration gradients
In a p-n junction, what happens to the barrier potential when a reverse bias is applied?
The barrier potential increases, impeding the flow of current
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