Name two good conductors, two good insulators, and two semiconductors. Last Answer : In general all metals are good conductors, with silver the best and copper second.
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
Photoconductivity is a characteristic of semiconductors. When light falls on certain semiconductors, it (a) Sets free electrons from some of the atoms, increasing the conductivity (b) Ejects ... Establishes a potential difference creating a source of EMF (d) Produces heat raising the temperature Last Answer : Photoconductivity is a characteristic of semiconductors. When light falls on certain semiconductors, it Sets free electrons from some of the atoms, increasing the conductivity
Last Answer : In elections devices semi conducters are used
Photovoltaic cells are semiconductors of Last Answer : Photovoltaic cells are semiconductors of A. silicon B. gallim arsinide C. cadmium telluride D. all the above
Assertion : Zone refining method is very useful for producing semiconductors. Reason : Semiconductors are of high purity. Last Answer : Assertion : Zone refining method is very useful for producing semiconductors. Reason : Semiconductors are of high purity.
What are the semiconductors in the periodic table? Last Answer : The ones adjacent to silicon.
What common element is used in semiconductors? Last Answer : silicon
Why is silicon and germanium used in semiconductors.pdf? Last Answer : Feel Free to Answer
What are semiconductors made of? Last Answer : Semi conducts are made of a crystalline (usually silicon) tube connected to two electrodes. See http://en.wikipedia.org/wiki/Diode
Which is used for manufacturing chips? A) Bus B) Control unit C) Semiconductors D) A and b only Last Answer : Answer : C
When two semiconductors of p-and ntype are brought in contact, they form p-n junction which acts like a/an – (1) Conductor (2) Oscillator (3) Rectifier (4) Amplifier Last Answer : (3) Rectifier Explanation: P-n junction is a device which flows current in one direction when it is forward biased and when it is reverse biased it doesn't flow any current through it. So it ... (AC), which periodically reverses direction, to direct current (DC), which flows in only one direction.
Silicon is used in which of the following? (1) Semiconductors (2) solar energy devices (3) transistors (4) All of these Last Answer : (4) All of these Explanation: Silicon is a chemical element (its symbol in chemical formula expressions is "Si") that is present in sand and glass and which is the best known semiconductor material in electronic components. Its atomic number is 14.
What are semiconductors? Last Answer : The materials whose electrical property lies between those of conductors and insulators are known as Semiconductors. Ex germanium, silicon. It has two types. 1. Intrinsic semiconductor 2. Extrinsic semiconductor.
Write briefly a. Supernova: b. Radioactivity c. Laser: d. Semiconductors: e. Geothermal Energy Last Answer : a. Supernova: star increasing suddenly in brightness. b. Radioactivity: spontaneous disintegration of atomic nuclei, with the emission of usu. penetrating radiation or particles. c. Laser: device ... a computer program and intended to corrupt the system or destroy data. g. Pasteurization:
How are extrinsic semiconductors classified? Last Answer : Extrinsic semiconductors are classified into two types depending upon the type of impurity added into a) n-type semiconductor b) p-type semiconductors.
Give reason: a) 14th group electrons are semiconductors except carbon. Last Answer : a) 14th group electrons are semiconductors except carbon.The valence electrons have a low energy that they cannot become free by absorbingnormal energy from the surroundings. b) Silicon is ... same 4 valence electrons but silicon can be used at highertemperatures, cheaper and abundantly available.
What is the reason for the conductivity of semiconductors? Last Answer : Semiconductors require a small amount of energy to break the covalent bond to set theelectron free. Thus as the temperature increases, the number of electrons dissociatedfrom their atoms increases. Thus semiconductors behave as conductors.
What are semiconductors? Give example. Last Answer : Substances that have conductivity between that of conductors and insulators are called semiconductors. Example: Silicon, Germanium
Semiconductors have electron number density of order A. 1024 m-3 B. 1020 m-3 C. 1012 m-3 D. 1023 m-3 Last Answer : 1023 m-3
Which is used for manufacturing chips? a. Bus b. Control unit c. Semiconductors d. A and b only Last Answer : . Semiconductors
The skin effect is a phenomenon observed in a) Insulators b) Dielectrics c) Conductors d) Semiconductors Last Answer : c) Conductors
Skin depth phenomenon is found in which materials? a) Insulators b) Dielectrics c) Conductors d) Semiconductors Last Answer : c) Conductors
Semiconductors possess which type of bonding? a) Metallic b) Covalent c) Ionic d) Magnetic Last Answer : b) Covalent
Dielectric constant will be high in a) Conductors b) Semiconductors c) Insulators d) Superconductors Last Answer : c) Insulators
With increase in temperature, the electrical conductivity of semiconductors (A) Increases (B) Decreases (C) Remain constant (D) Either (A) or (B), depends on the type of semi-conductor Last Answer : Option A
. With increase in temperature, the electrical conductivity of semiconductors (A) Increases (B) Decreases (C) Remain constant (D) Either (A) or (B), depends on the type of semi-conductor Last Answer : Option A
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.
What is the primary advantage of bulk-effect devices over normal pn-junction semiconductors? Last Answer : Larger microwave power outputs.
Which is used for manufacturing chips? a. Bus b. Control unit c. Semiconductors d. A and b only Last Answer : c. Semiconductors
Conductors, Semiconductors and insulators
Transistors are made from (a) Plastic (b) metals (c)insulators (d) doped semiconductors Last Answer : d) doped semiconductors
Pure semiconductors silicon and germanium are a) Extrinsic b) Intrinsic c) Insulator d) Diodes Last Answer : b) Intrinsic
Substances of conductivity between 10–10 10–20 (n m )–1 are: a) Insulators b) Semiconductors c)Super conductors d)Good conductors Last Answer : a) Insulators
he substances of conductivity of the order of 10–6 – 10–4 (m)–1 are : a) Insulators b) Super conductors c) Semiconductors d)Good conductors Last Answer : d)Good conductors
Magnetic materials (A) provide path to magnetic flux. (B) are good insulators. (C) are semiconductors. (D) None. Last Answer : (A) provide path to magnetic flux.
Hall effect is associated with (A) Conductors. (B) Semiconductors. (C) Thermistors. (D) Solders. Last Answer : (B) Semiconductors.
Holes are majority carriers in (A) P-type semiconductors. (B) N-type semiconductors. (C) Insulators. (D) Superconductors. Last Answer : (A) P-type semiconductors.
Ceramics are good (A) insulators. (B) conductors. (C) superconductors. (D) semiconductors. Last Answer : (A) insulators.
All semiconductors in their last orbit have (A) 8 electrons. (B) 2 electrons. (C) 4 electrons. (D) 6 electrons. Last Answer : (C) 4 electrons.
The covers of electrical machines are made of (A) soft magnetic materials. (B) hard magnetic materials. (C) super conductors. (D) semiconductors. Last Answer : (A) soft magnetic materials.
Czochralski method is widely used for the growth of crystal of -------------materials. a) Conductors b) semiconductors c) insulator d) conductors & insulators Last Answer : b) semiconductors
Materials exhibiting zero value of resistivity are known as ______ . (a) conductors (b) semiconductors (c) insulators (d) superconductors Last Answer : (d) superconductors
Strong and ductile materials (a) Polymers (b) Ceramics (c) Metals (d) Semiconductors Last Answer : (c) Metals
The dominant charge carriers in p-type semiconductors are: w) neutrons x) electrons y) protons z) holes Last Answer : ANSWER: Z -- HOLES
In N-type semiconductors the majority of the carriers are: w) holes x) electrons y) protons z) neutrons Last Answer : ANSWER: X -- ELECTRONS
When two semiconductors of pand n-type are brought in contact, they form p-n junction which acts like a/an (1) Conductor (2) Oscillator (3) Rectifier (4) Amplifier Last Answer : Rectifier