How are p-n junctions formed?
By pressing p-type and n-type semiconductors together with great force
By soldering p-type and n-type semiconductors together
By diffusing gaseous p-type and n-type impurities into the semiconductor before it solidifies
In which of the following do p-n junction diodes conduct?
Forward bias
Either bias
Reverse bias
When a diode conducts what happens to the depletion layer?
It is reduced
It is unchanged
It is widened
A diode only conducts when the applied potential difference is:
Less than the potential barrier
Equal to the potential barrier
Greater than the potential barrier
If the energy difference between p-type and n-type is great enough, which of the following can be emitted?
Photons of light
Sound waves
Gamma radiation
Which of the following is the best description of a p-n diode as a photovoltaic cell?
Photons of light are released as electrons cross the depletion layer
Photons of light are absorbed as part of a chemical reaction
Photons of light give electrons sufficient energy to move to conduction band giving a potential difference