12. which of the following accurately describes semiconductor diodes? a. point-contact
a. point-contact diodes are more likely to be used as rectifiers than junction diodes.
b. unlike junction diodes, point-contact diodes are enclosed in a suitable casing and have terminals for connecting them to a circuit.
c. unlike point-contact diodes, junction diodes utilize a point of metal wire in contact with a single wafer of p-type or n-type material.
d. junction diodes are preferred over point-contact diodes for most purposes.
Answer;
D. Junction diodes are preferred over point-contact diodes for most purposes.
Junction diodes are preferred over point-contact diodes for most purposes; accurately describes semiconductor diodes.
Explanation;
-Semiconductor diodes are specialized electronic components with two electrodes called the anode and the cathode, that are made with semiconductor materials such as silicon, germanium, or selenium.
-Point contact diode is formed by touching a metallic wire with an N-type semiconductor to form a small area of contact.
-A p-n junction diode is two-terminal or two-electrode semiconductor device, which allows the electric current in only one direction while blocks the electric current in opposite or reverse direction. Junction diodes are preferred over point-contact diodes for most purposes.
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