Description : The point on the current curve of a gallium-arsenide semiconductor at which it begins to exhibit negative resistance is called what?
Last Answer : Threshold.
Description : What happens to the electrons of a gallium-arsenide semiconductor when they move from the normal low-energy conduction band to the high-energy conduction band?
Last Answer : The electrons become immobile.
Description : It is the made from semiconductor material such as aluminum-galium-arsenide or gallium-arsenide-phosphide. A. APD B. Injection laser diode C. Light emitting diode D. Positive-intrinsic-negative
Last Answer : C. Light emitting diode
Description : Tunnel diode is a: a) Power diode b) Has light doping c) Has heavy doping d) Is a reverse recovery diode Ans: C 76.LEDs are fabricated from: a) Silicon b) Germanium c) Si or Ge d) Gallium arsenide
Last Answer : Ans: D
Description : What kind of battery panels are used in some advance satellites? A. Gallium Arsenide solar panel B. Germanium based panels C. Silicon based panels D. Gallium Phosphate solar panel
Last Answer : A. Gallium Arsenide solar panel
Description : Between silicon and gallium arsenide, which has the greatest index of refraction? ∙ A. Gallium arsenide ∙ B. Neither of silicon nor gallium arsenide ∙ C. Silicon ∙ D. They are equal
Last Answer : Gallium arsenide
Description : What characteristic of a gunn oscillator is inversely proportional to the transit time of the domain across the semiconductor?
Last Answer : The frequency.
Description : What semiconductor device produces electrical energy when exposed to light?
Last Answer : Photovoltaic cell.
Description : Why are time-domain reflectometers often compared to a radar system?
Last Answer : Both transmit a pulse and analyze the signal reflection.
Description : What is the capacitive reactance across a point-contact diode as compared to a normal junction diode?
Last Answer : Lower.
Description : The resistivity of indium arsenide arsenide is `rho=2.5 xx10^(-3) Omega m` and its Hall constant is `C_(H)=10^(-2) m^(3)//c`. Find the concentration a
Last Answer : The resistivity of indium arsenide arsenide is `rho=2.5 xx10^(-3) Omega m` and its Hall ... and mobility of the charge carriers in this material.
Description : What is the formula for manganese(viii) arsenide?
Last Answer : The formula for manganese(VII) arsenide is Mn3As7.
Description : What type of rectifier is constructed by sandwiching a section of semiconductor material between two metal plates?
Last Answer : Metallic rectifier.
Description : Conduction in which type of semiconductor material is similar to conduction in a copper wire?
Last Answer : N-type material.
Description : What are the majority carriers in a P-type semiconductor?
Last Answer : Holes.
Description : What type of PN diode is formed by using a fine metal wire and a section of N-type semiconductor material?
Last Answer : Point-contact.
Description : What are the majority carriers in an N-type semiconductor?
Last Answer : Electrons.
Description : As shown in the illustration, which electrical symbol represents a PNP type semiconductor? EL-0065 A. A B. B C. C D. D
Last Answer : Answer: C
Description : What is the name given to the semiconductor device that has three or more elements?
Last Answer : Transistor
Description : What does the letter "N" indicate in the semiconductor identification system?
Last Answer : A semiconductor.
Description : What is the name given to a piece of pure semiconductor material that has an equal number of electrons and holes?
Last Answer : Intrinsic.
Description : Name the two types of current flow in a semiconductor.
Last Answer : Electron flow and hole flow.
Description : State one requirement of an electron tube, which does not exist for semiconductors, that makes the tube less efficient than the semiconductor.
Last Answer : The electron tube requires filament or heater voltage, whereas the semiconductor device does not; consequently, no power input is spent by the semiconductor for conduction.
Description : What is lowest current at which stimulated emission exceeds spontaneous emission in a semiconductor laser called?
Last Answer : Threshold current.
Description : What are the two most common semiconductor materials used in electronic and electro-optic devices?
Last Answer : Silicon and gallium arsenide.
Description : Which semiconductor sources (LD or LED) emit more focused light and are capable of launching sufficient optical power into both single mode and multimode fibers?
Last Answer : LDs.
Description : Semiconductor LEDs emit incoherent light. Define incoherent light
Last Answer : Light waves that lack a fixed-phase relationship
Description : What are the four most common materials used in semiconductor detector fabrication?
Last Answer : Silicon, gallium arsenide, germanium, and indium phosphide.
Description : What is another name for semiconductor memory chips?
Last Answer : Integrated circuits.
Description : A semiconductor memory consists of what?
Last Answer : hundreds of thousands of tiny electronic circuits etched on a silicon chip
Description : What characteristic of a transistor is varied in a semiconductor-reactance modulator?
Last Answer : Collector-to-emitter capacitance.
Description : The time it takes a light induced carrier travel across the depletion region of the semiconductor. ∙ A. dispersion ∙ B. response time ∙ C. irradiance ∙ D. transit time
Last Answer : D. transit time
Description : The time it takes a light induced carrier travel across the depletion region of the semiconductor.
Last Answer : . transit time
Description : What kind of item would be considered an electrical semiconductor?
Last Answer : Batteries that charge up if sun light hits them. Also, reusable batteries, that you charge up when their power is gone.
Description : If electrical conductivity increases with the increase of temperature of a substance, then it is a: (1) Conductor (2) Semiconductor (3) Insulator (4) Carborator
Last Answer : (2) Semiconductor Explanation: A solid substance that has conductivity between that of an insulator and that of most metals, either due to the addition of an impurity or because of temperature effects
Description : If electrical conductivity increases with the increase of temperature of a substance, then it is a (1) Conductor (2) Semiconductor (3) Insulator (4) Carborator
Last Answer : (2) Semiconductor Explanation: A solid substance that has conductivity between that of an insulator and that of most metals, either due to the addition of an impurity or because of temperature effects.
Description : A 'dielectric' is a/an ________________. A. electrical insulator B. current flow C. good conductor D. semiconductor material
Last Answer : Answer: A
Description : The electrical conductivity of a semiconductor increases with increase in temperature because (a) the carrier concentration increases (b) the mobility of carrier increases (c) both carrier concentration and mobility increase (d) the band gap decreases
Last Answer : The electrical conductivity of a semiconductor increases with increase in temperature because the carrier concentration increases
Description : What is the difference between the domain theory and Weber’s theory of magnetism?
Last Answer : The domain theory is based upon the electron spin principle; Weber’s theory uses the concept of tiny molecular magnets.
Description : What is the main advantage of using a time-domain reflectometer (tdr) to test a transmission line?
Last Answer : Tdr will indicate the nature of and the distance to or location of any faults.
Description : Which temperature does the gallium melt ? -Science
Last Answer : 29.76 °C or 85.6°F is the melting point of Gallium The Boiling Point is 4044°F (2229°C).
Description : At which temperature does the gallium melt ? -Science
Last Answer : The element gallium possesses some of the re- quisite properties for a heat-transfer liquid. It is a unique material, having a low melting point and a high boiling point. Pure gallium melts at 29.78°C, and suitable alloying will produce a metal which melts below room temperature.
Description : What is the sign of gallium ?
Last Answer : Ga Galliav's signal
Description : What is the number of electrons in gallium ?
Last Answer : The number of electrons in gallium is 31 .
Description : Is gallium a cation or anion?
Last Answer : Gallium is a metallic element. It forms cations Ga3+ and Ga+
Description : What can gallium create?
Last Answer : The chemical element gallium can create gallium compounds.Gallium nitrate is but one. There are many gallium compounds thatare critical to the semiconductor industry, and life as we know itgrinds to a halt without semiconductors.
Description : How many elements does gallium have?
Last Answer : Gallium is a chemical element. One might say it has one element.
Description : What kind of bond is gallium bromide?
Last Answer : Gallium bomide has an ionic bond.
Description : How much gallium is used a year?
Last Answer : Approx. 400 t gallium is used in a year.
Description : Which is a property that Mendeleev's predicted for gallium?
Last Answer : Examples: density, melting point, atomic weight, density and formula of oxide.