11. ______ technology is used to provide faster devices.
A. silicon-based FET technology
B. silicon-based MOS technology
C. gallium arsenide based MOS technology
D. gallium arsenide based VLSI technology
Answer: D
Gallium arsenide-based VLSI technology is used to provide for the faster devices which will be required as the sophistication of our system design capabilities.
12. Silicon logic is faster than gallium arsenide.
A. true
B. false
Answer: B
Silicon logic has speed limitations that are becoming apparent in the state-of-the-art fast digital system design.
13. ________ is used with silicon to satisfy the need for very high speed integrated technology.
A. gallium oxide
B. gallium arsenide
C. silicon dioxide
D. aluminum
Answer: B
Gallium arsenide is used in conjunction with silicon to satisfy the need for very high-speed integrated technology (VHSI) in many new systems.
14. Gallium arsenide has _______ electron mobility.
A. high speed
B. low speed
C. smaller
D. larger
Answer: A
The high-speed electron mobility of gallium arsenide with respect to silicon is better for innovative systems.
15. Which technology has a semi-insulating substrate?
A. silicon
B. silicon nitride
C. gallium oxide
D. gallium arsenide
Answer: D
Gallium arsenide has a semi-insulating substrate with consequent lower parasitics which improve its optoelectrical properties.
16. Gallium is produced as a byproduct of
A. aluminum production process
B. sulfur production process
C. nitrogen production process
D. oxygen production process
Answer: A
Gallium which is a toxic material is produced as a byproduct of zinc production process and aluminum production processes.
17. Arsenic is produced from
A. AsS3
B. As2S3
C. As2S
D. As2S3 or As2S4
Answer: D
Arsenic which is also a very toxic material is produced from the ores such as As2S3 or As2S4.
18. The first process involved in the production of arsenic is
A. reduction
B. oxidation
C. combination
D. diffusion
Answer: B
Firstly, the ores go through the oxidation process and then reduction with carbon is done to produce arsenic.
19. Gallium has a
A. positively charged nucleus +31
B. positively charged nucleus +33
C. negatively charged nucleus -31
D. negatively charged nucleus -33
Answer: A
Gallium has a positively charged nucleus of +31 whereas arsenic has a positively charged nucleus of +33.
20. Energy level of electrons is dictated by
A. electron’s charges
B. electron’s momentum
C. electron’s mass
D. electron’s weight
Answer: B
Each electron in its relationship with its parent nucleus exhibits an energy value. This energy is dictated by the electron’s momentum and its physical proximity to the nucleus.
