Semiconductors and Diodes (Smart Edge)

Question 1

Intrinsic semiconductor material is characterized by a valence shell of how many electrons?

A. 1
B. 2
C. 4
D. 6

Answer 1

C

Question 2

What electrical characteristic of intrinsic semiconductor material is controlled by the addition of impurities?

A. Conductivity
B. Resistance
C. Power
D. All of the Above

Answer 2

A

Question 3

The forward voltage across a conducting silicon diode is about

A. 0.3V
B. 1.7V
C. -0.7V
D. 0.7V

Answer 3

D

Question 4

What is the maximum power rating for LEDs?

A. 150 mW
B. 500 mW
C. 1 W
D. 10 W

Answer 4

A

Question 5

The test current in a Zener diode IZT is the current defined by the power level.

A. 0.25
B. 0.5
C. 0.75
D. 1.00

Answer 5

A

Question 6

Which diode(s) has (have) a zero level current and voltage drop in the ideal model?

A. Si
B. Ge
C. Both Si and Ge
D. Neither Si nor Ge

Answer 6

C

Question 7

The atomic number of an element is determined by

A. The number of neutrons
B. The number of protons
C. The number of neutrons plus the number of protons
D. The number of electrons

Answer 7

B

Question 8

For high voltage applications, we use

A. Center-tap rectifier
B. Bridge type rectifier
C. Half-wave rectifier
D. None of the above

Answer 8

B

Question 9

For high temperature and high power requirement of semiconductors, the material used is
A. SiC
B. Si
C. Ge
D. sb

Answer 9

A

Question 10

The wavelength and frequency of light of a specific color are directly related to the

A. Power supply
B. Voltage supply
C. Energy band gap
D. Threshold

Answer 10

C