SEMICON - GIBILISCO

The term "semiconductor" arises from:

• A. Resistor-like properties of metal oxides.
• B. Variable conductive properties of some materials.
• C. The fact that there's nothing better to call silicon.
• D. Insulating properties of silicon and GaAs

Which of the following is not an advantage of semiconductor devices over vacuum tubes?

• A. Smaller Size.
• B. Lower working voltage.
• C. Lighter weight.
• D. Ability to withstand high voltages.

The most common semiconductor among the following substances is:

• A. Germanium
• B. Galena
• C. Silicon
• D. Copper

GaAs is a(n):

• A. Compound
• B. Element
• C. Conductor
• D. Gas

A disadvantage of gallium-arsenide devices is that:

• A. The charge carriers move fast.
• B. The material does not react to ionizing radiation.
• C. It is expensive to produce.
• D. It must be used at high frequencies.

Selenium works especially well in:

• A. Photocells
• B. High-frequency detectors.
• C. Radio-frequency power amplifiers.
• D. Voltage regulators

Of the following, which material allows the lowest forward voltage drop in a diode?

• A. Selenium
• B. Silicon
• C. Copper
• D. Germanium

A CMOS integrated circuit:

• A. Can only work at low frequencies.
• B. Is susceptible to damage by static.
• C. Requires considerable power to function.
• D. Needs very high voltage.

The purpose of doping is to:

• A. Make the charge carriers move faster.
• B. Cause holes to flow.
• C. Give a semiconductor material certain properties.
• D. Protect devices from damage in case of transients.

A semiconductor material is made into N type by:

• A. Adding an acceptor impurity.
• B. Adding a donor impurity.
• C. Injecting electrons.
• D. Taking electrons away.