Key Topic 28: Devices

Question 1

3-28C1: What describes a diode junction that is forward biased?

A. It is a high impedance.
B. It conducts very little current.
C. It is a low impedance.
D. It is an open circuit.

Answer 1

C. It is a low impedance.

Question 2

3-28C2: Why are special precautions necessary in handling FET and CMOS devices?

A. They have fragile leads that may break off.
B. They are susceptible to damage from static charges.
C. They have micro-welded semiconductor junctions that are susceptible to breakage.
D. They are light sensitive.

Answer 2

B. They are susceptible to damage from static charges.

Question 3

3-28C3: What do the initials CMOS stand for?

A. Common mode oscillating system.
B. Complementary mica-oxide silicon.
C. Complementary metal-oxide semiconductor.
D. Complementary metal-oxide substrate.

Answer 3

C. Complementary metal-oxide semiconductor.

Question 4

3-28C4: What is the piezoelectric effect?

A. Mechanical vibration of a crystal by the application of a voltage.
B. Mechanical deformation of a crystal by the application of a magnetic field.
C. The generation of electrical energy by the application of light.
D. Reversed conduction states when a P-N junction is exposed to light.

Answer 4

A. Mechanical vibration of a crystal by the application of a voltage.

Question 5

3-28C5: An electrical relay is a:

A. Current limiting device.
B. Device used for supplying 3 or more voltages to a circuit.
C. Component used mainly with HF audio amplifiers.
D. Remotely controlled switching device.

Answer 5

D. Remotely controlled switching device.

Question 6

3-28C6: In which oscillator circuit would you find a quartz crystal?

A. Hartley.
B. Pierce.
C. Colpitts.
D. All of the above.

Answer 6

B. Pierce.