Name two elements that find wide application in transistor industry (1) Silicon and Germanium (2) Carbon and Platinum (3) Iridium and Germanium (4) Tungsten and Platinum

1 Answer

Answer :

Silicon and Germanium

Related questions

Description : Name two elements that find wide application in transistor industry – (1) Silicon and Germanium (2) Carbon and Platinum (3) Iridium and Germanium (4) Tungsten and Platinum

Last Answer : (1) Silicon and Germanium Explanation: A transistor is a semiconductor device used to amplify and switch electronic signals and electrical power. Semiconductor material (date first used): the metalloids ... -germanium (1989), the allotrope of carbon graphene (research ongoing since 2004), etc.

Description : why silicon type transistor are more often used than germanium?

Last Answer : because silicon has smaller cutoff current Icbo, small variations in Icbo due to variation in temperature as compared to those in case of germanium.

Description : For transformation, micro-particles coated with DNA to be bombarded with gene gun are made up of (a) silver or platinum (b) platinum or zinc (c) silicon or platinum (d) gold or tungsten.

Last Answer : (d) gold or tungsten.

Description : For transfomation, micro-particles coated with DNA to be bombarded with gene gun are made up of (1) Gold or Tungsten (2) Silver or Platinum (3) Platinum or Zinc (4) Silicon or Platinum

Last Answer : (1) Gold or Tungsten

Description : Name the element discovered upon its extraction from pitchblende? w) platinum x) uranium y) iridium z) plutonium

Last Answer : ANSWER: X -- URANIUM

Description : Metalloids (A) Are good conductor of heat & electricity (B) Act as electron donors with metals & as electron acceptor with non metals (C) Are not necessarily solids at room temperature ... & non-metallic properties to some extent and are exemplified by elements like germanium, silicon & boron

Last Answer : D) Are compounds that exhibit both metallic & non-metallic properties to some extent and are exemplified by elements like germanium, silicon & boron

Description : Which of the following elements are used as dopants in silicon or germanium semiconductors? A) Antimony B) Phosphorus C) Arsenic D) All the above

Last Answer : Which of the following elements are used as dopants in silicon or germanium semiconductors? A) Antimony B) Phosphorus C) Arsenic D) All the above

Description : Which one of the following is an ohmic conductor? (1) Germanium (2) Silicon (3) Carbon (4) Silver

Last Answer : (4) Silver Explanation: Ohmic conductors are conductors that obey Ohm's law, that is Voltage/Current ratio is constant; in other words, the equation Resistance = Voltage/Current is obeyed. ... s resistance does not change with varying current. Metallic conductors such as silver are Ohmic conductors.

Description : Which one of the following is an ohmic conductor? (1) Germanium (2) Silicon (3) Carbon (4) Silver

Last Answer : Silver

Description : Mendeleev proposed the existence of an unknown element that he called eka-aluminum. The element is now called: w) magnesium x) silicon y) gallium z) germanium

Last Answer : ANSWER: C -- GALLIUM

Description : Among the following the hardest metal is – (1) Gold (2) Iron (3) Platinum (4) Tungsten

Last Answer : (4) Tungsten Explanation: Titanium is the hardest natural metal in the world. It is very strong, three times the strength of steel and much stronger than gold, silver and platinum and yet is very ... normal wear. Tungsten carbide is two times as hard as steel and four times as hard as titanium.

Description : Among the following the hardest metal is (1) Gold (2) Iron (3) Platinum (4) Tungsten

Last Answer : Tungsten

Description : Which one of the following elements is not found in nature? w) Technetium x) Iridium y) Osmium z) Molybdenum

Last Answer : ANSWER: W -- TECHNETIUM 

Description : Why is silicon and germanium used in semiconductors.pdf?

Last Answer : Feel Free to Answer

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 : Which of the listed pairs of materials make the best insulators? A. dry air and a vacuum B. tin and lead C. doped silicon and germanium D. paper and oil

Last Answer : Answer: D

Description : Which of the listed pairs of materials make the best insulators? A. copper and aluminum B. glass and mica C. dry air and a vacuum D. doped silicon and germanium

Last Answer : Answer: B

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 : Why cannot thousands of compounds of Boron or silicon or germanium not possible?

Last Answer : Even though B-B, Si-Si, Ge-Ge bonds exits, these compounds are unstable and very reactive and do not last long.

Description : Give reason: Silicon is used widely even through Germanium is a better semiconductor material.

Last Answer : Silicon is the second most abundantly available material and it can be used at higher temperature. Hence it widely used than Germanium.

Description : Which of the following is not an example of elemental solid dielectric? a) Diamond b) Sulphur c) Silicon d) Germanium

Last Answer : c) Silicon

Description : When a sample of germanium and silicon having same impurity density are kept at room temperature then Resistivity of silicon will be higher than that of germanium, Why?

Last Answer : Ans-The answer is simple. Consider the PN diode for Ge 0.3eV is the breakdown voltage and in the case of Si its 0.7eV since the impurities are added in the same amount the bond due to the other atoms of the Si makes it resistive compared to the Ge.. thats all!

Description : Semiconductor germanium and silicon are (a) Pentavalent (b) trivalent (c) divalent (d) tetravalent

Last Answer : (d) tetravalent

Description : Pure semiconductors silicon and germanium are a) Extrinsic b) Intrinsic c) Insulator d) Diodes

Last Answer : b) Intrinsic

Description :  ‘Germanium diode knee voltage is lower than silicon diode knee voltage.' Justify.

Last Answer : Justification: The band gap between conduction and valence band for Germanium (0.66eV) is less as compared to Silicon (1.11eV).Hence less energy is required to start conduction in Germanium diode. 

Description : The Maximum spectral response of the germanium and silicon is in the   (A) infrared region (B) ultraviolet region (C) visible region (D) x-ray region

Last Answer : The Maximum spectral response of the germanium and silicon is in the ultraviolet region

Description : The hardest substance available in earth is – (1) Platinum (2) Silicon (3) Diamond (4) Gold

Last Answer : (3) Diamond Explanation: Diamond is the hardest naturally occurring substance found on Earth. But it is not the hardest substance.

Description : Which of the following elements replaced eka-Aluminium in Mendeleev's Periodic Table? (1) Scandium (2) Gallium (3) Titanium (4) Germanium

Last Answer : (2) Gallium

Description : Which of the following pairs of elements may form an alloy? (A) Iron & carbon (B) Iron & mercury (C) Platinum & mercury (D) None of these

Last Answer : (A) Iron & carbon

Description : Which of the following groups of elements have an OUTER ELECTRONIC configuration of S-2-P-2? w) halogens x) Nitrogen-Phosphorus Group y) Carbon-Silicon Group z) Boron-Aluminum Group

Last Answer : ANSWER: Y -- CARBON-SILICON GROUP

Description : Hypersil' is a __________ steel. (A) High speed (B) Silicon (C) Molybdenum (D) Tungsten

Last Answer : (B) Silicon

Description : Corrosion resisting properties of cast iron are significantly improved by the addition of 12 - 15% of (A) Tungsten (B) Vanadium (C) Silicon (D) All (A), (B) & (C)

Last Answer : (C) Silicon

Description : _________ is the hardest material out of the following. (A) Boron carbide (B) Tungsten carbide (C) Hardened steel (D) Silicon carbide

Last Answer : (A) Boron carbide

Description : For which of the following substances, the resistance decreases with increase in temperature? (1) Pure silicon (2) Copper (3) Nichrome (4) Platinum

Last Answer : (3) Nichrome Explanation: Nichrome has high resistance and it is called a resistor.

Description : For which of the following substances, the resistance decreases with increase in temperature? (1) Pure silicon (2) Copper (3) Nichrome (4) Platinum

Last Answer : Nichrome

Description : Which of the following elements is not present in stainless steel? (1) Iron (2) Tungsten (3) Chromium (4) Nickel

Last Answer : (2) Tungsten Explanation: Stainless steel is defined as a steel alloy of iron with a minimum of 10.5% to 11% chromium content by mass. There are different types of stainless steels: ... stabilized. This crystal structure makes such steels virtually non-magnetic and less brittle at low temperatures.

Description : Which one of the following elements is essential for the construction of nuclear reactors? (1) Cobalt (2) Nicke (3) Zirconium (4) Tungsten

Last Answer : (3) Zirconium Explanation: Zirconium is an essential element for the construction of nuclear reactors.

Description : Which of the following elements is not present in stainless steel? (1) Iron (2) Tungsten (3) Chromium(4) Nickel

Last Answer : Tungsten

Description : Which of the following elements does not occur in nature as a native ore? w) silver x) gold y) platinum z) aluminum

Last Answer : ANSWER: Z -- ALUMINUM

Description : Which of the following is an insulator? (1) Mercury (2) Carbon (3) Germanium (4) Glass

Last Answer : (4) Glass Explanation: Insulators are materials that do not allow the transfer or that slow the transfer of heat or electricity. Some of the examples of insulators are: glass, plastic, rubber, porcelain, wood, ceramic, dry air, etc.

Description : Which of the following is an insulator? (1) Mercury (2) Carbon (3) Germanium (4) Glass

Last Answer : Glass

Description : Steel is composed of a number of elements. The two essential elements are iron and w) aluminum x) carbon y) nickel z) silicon 

Last Answer : ANSWER: X -- CARBON

Description : Which of the following elements is not present abundantly in earth’s crust ? A. Silicon B. Radium (Answer) C. Aluminum D. Carbon

Last Answer : B. Radium (Answer)

Description : The Second Generation Computer was based on . A) Vacuum Tube B) Silicon Chips C) Transistor D) Bio Chips

Last Answer : Answer : C

Description : An integrated circuit is A) A complicated circuit B) An integrating device C) Much costlier than a single transistor D) Fabricated on a tiny silicon chip

Last Answer : Answer : D

Description : The material used in the fabrication of a transistor is – (1) Aluminium (2) Copper (3) Silicon (4) Silver

Last Answer : (3) Silicon Explanation: A transistor is a semiconductor device used to amplify and switch electronic signals and electrical power. The first transistors were made from germanium (Ge). ... compound semiconductor material gallium arsenide (GaAs) and the semiconductor alloy silicon germanium (SiGe).

Description : Figure 'B' shown in the illustration represents a/an ____________. EL-0067 A. silicon controlled rectifier B. junction field effect transistor C. diac thyristor D. IG MOS field effect transistor

Last Answer : Answer: A

Description : Figure 'A' of the diagram shown in the illustration represents a/an ____________. EL-0078 A. silicon controlled rectifier B. IG or MOS field effect transistor C. triac thyristor D. junction field effect transistor

Last Answer : Answer: B

Description : Figure 'B' of the diagram shown in the illustration represents a/an ____________. EL-0065 A. silicon controlled rectifier B. junction field effect transistor C. diac thyristor D. IG or MOS field effect transistor

Last Answer : Answer: B

Description : The symbol in figure 'A' shown in the illustration represents a ____________. EL-0065 A. diac B. field effect transistor C. silicon controlled rectifier D. unijunction transistor

Last Answer : Answer: D