The transferred electron bulk effect occurs in

1 Answer

Answer :

The transferred electron bulk effect occurs in Gallium Arsenide

Related questions

Description : In any atom the potential energy of an orbiting electron is   (A) always positive (B) always negative (C) sometime positive, sometime negative (D) numerically less then its kinetic energy.

Last Answer : In any atom the potential energy of an orbiting electron is always negative 

Description : In order to generate electron-hole pairs, the maximum wavelength of radiation for Silicon (Band gap = 1.1 eV) is  (a) 1.88 μm (b) 1.68 μm (c) 1.13 μm (d) 1.54 μm

Last Answer : In order to generate electron-hole pairs, the maximum wavelength of radiation for Silicon (Band gap = 1.1 eV) is 1.13 μm

Description : What is the charge and mass of an electron?

Last Answer : Charge on electrons is 1.6022*10-19CAnd the mass of electrons is 9.109*10-31 kg

Description : A process by which heat is transferred through a material without a bulk movement of the material.  a. Convection  b. Conduction  c. Radiation  d. Emission

Last Answer : Conduction

Description : When potassium forms a compound with iodine one electron is transferred from the atom to the atom?

Last Answer : Potassium lose an electron (iodine gain this electron) to form potassium iodide, KI.

Description : When microwave energy is passed through a piece of ferrite in a magnetic field, another effect occurs. If the frequency of the microwave energy is much greater than the electron wobble frequency, the plane of polarization of the wavefront is rotated. This is known as

Last Answer : Faraday Rotation Effect

Description : Assertion (A) `:` Replication and transcription occur in the nucleus but translation occurs in the cytoplasm. Reason (R ) `:` m-RNA is transferred fro

Last Answer : Assertion (A) `:` Replication and transcription occur in the nucleus but translation occurs in the ... D. If both assertion and reason are false.

Description : What occurs as energy is transferred through a wave?

Last Answer : Water particles are set in circular motion.

Description : Bubonic plague occurs a) after the organism enters through the skin. Bubonic refers to enlarged lymph nodes that develop after the organism enters through the skin. Bubonic plague is the form seen ... frequently, as the organism is transferred from rodents or other animals to humans by insect bite.

Last Answer : a) after the organism enters through the skin. Bubonic refers to enlarged lymph nodes that develop after the organism enters through the skin. Bubonic plague is the form seen most frequently, as the organism is transferred from rodents or other animals to humans by insect bite.

Description : An increase in the number of new cells in an organ or tissue that is reversible when the stimulus for production of new cells is removed is termed a) Hyperplasia. Hyperplasia occurs as cells multiply ... in the number of new cells in an organ or tissue continues after the stimulus is removed.

Last Answer : a) Hyperplasia. Hyperplasia occurs as cells multiply and are subjected to increased stimulation resulting in tissue mass enlargement.

Description : If an atom loses one or more electrons, it becomes _____.

Last Answer : It   becomes   positively  charged    atom.

Description : The correct order of electromagnetic spectrum with decreasing frequency is: (1) Microwaves, Radiowaves, Infrared rays, Ultraviolet rays, X-rays (2) Radiowaves, Infrared rays, Ultraviolet rays, ... Radiowaves, Ultraviolet rays (4) X-rays, Ultraviolet rays, Infrared rays, Microwaves, Radiowaves 

Last Answer : The correct order of electromagnetic spectrum with decreasing frequency is: (1) Microwaves, Radiowaves, Infrared rays, Ultraviolet rays, X-rays (2) Radiowaves, Infrared rays, Ultraviolet rays, ... Radiowaves, Ultraviolet rays (4) X-rays, Ultraviolet rays, Infrared rays, Microwaves, Radiowaves 

Description : Ferrites are types of (a) magnetic material (b) conducting material (c) semiconducting material (d) insulating material

Last Answer : Ferrites  are  types  of  magnetic  material.

Description : In which material, valence electrons are tightly bounded to their parent atoms ? (a) Conductor (b) Semiconductor (c) Insulator (d) Magnetic 

Last Answer : insulator(b)

Description : If temperature of a pure silicon specimen is increased, then (a) only number of free electrons increase. (b) only number of free holes increase. (c) number of free holes and free electrons increases. (d) only number of free holes decrease. 

Last Answer : Number  of  free  holes  and   free  electrons  increases.

Description : A material has conductivity of 10–2 mho/m and relative permittivity of 4. The frequency at which the conduction current in the medium is equal to the displacement current, is (a) 450 MHz (b) 900 MHz (c) 45 MHz (d) 90 MHz

Last Answer : C

Description : A cable has an insulation of relative permittivity 2. If the insulation is replaced by one of relative permittivity 4, then capacitance of the cable (a) is doubled (b) is halved (c) remains unchanged (d) is reduced 

Last Answer : B

Description : Three materials X, Y and Z having relative permittivity 2.5, 3.0 and 4.0 respectively are used in a single core cable. The materials on inner most and outer most layer respectively should be (a) X and Y (b) Y and Z (c) X and Z (d) Z and X 

Last Answer : Answer is option d Because the material with high relative permitivity should be used as the inner most layer of the cable,to withstand with the  high currents flowing in the conductor 

Description : A compact microstrip antenna may be obtained by

Last Answer : A compact microstrip antenna may be obtained by cutting slot on the patch

Description : Frequency is inherently a physical quantity with characteristics.  a. Positive b. negative c. both a &b d. none of above 

Last Answer : Frequency is inherently a physical quantity with characteristics. Positive 

Description : The degree of coupling depends  (A) size of hole (B) location of holes (C) size and location of holes (D) not depend on size or location of hole

Last Answer : The degree of coupling depends location of holes

Description : Form the hot metal surface electrons escape because   (A) of change of state from metal to gas due to heat. (B) of change of state from gas to metal (C) the energy supplied is greater than the work function (D) the energy is greater than Fermi level

Last Answer : Form the hot metal surface electrons escape because the energy supplied is greater than the work function

Description : At a particular temperature and current density, the critical magnetic field for a Type I superconductor is Bc and that for a type II superconductor ranges from Bc1 to Bc2 keeping other ... will switch to the normal conducting state, while Type II superconductor will maintain a vortex sate

Last Answer : At a particular temperature and current density, the critical magnetic field for a Type I superconductor is Bc and that for a type II superconductor ranges from Bc1 to Bc2 keeping other ... will switch to the normal conducting state, while Type II superconductor will maintain a vortex sate

Description : In a metal wire, which particle carries electric current?

Last Answer : In   a  metal  wire  the  particles   responsible  for  carrying  electric  current  are  holes.

Description : Silicon dioxide is (A) a conductor (B) an insulator (C) a useful circuit element  (D) useful as contact in MOSFET

Last Answer : Silicon dioxide is an insulator

Description : A forward-biased PN-junction,  (A) results in increase in diffusion current  (B) results in increase in drift current  (C) results in decrease in drift current  (D) results in decrease in diffusion current

Last Answer : A forward-biased PN-junction,  results in increase in diffusion current 

Description : In a PN-junction with open circuit terminal (equilibrium), with P doping higher as compared to N doping (A) N-side depletion region is small as compared to p-side depletion region (B) N-side ... depletion region (C) N-side depletion region is same as p-side depletion region (D) Cannot say

Last Answer : In a PN-junction with open circuit terminal (equilibrium), with P doping higher as compared to N doping N-side depletion region is small as compared to p-side depletion region

Description : Which of the following is true regarding the band-gap energy of a semiconductor ? (A) Minimum energy required to break a covalent bond (B) On breaking of the bond, electron is generated (C) On breaking of the bond, electron-hole pair is generated (D) A & C both are true

Last Answer : Which of the following is true regarding the band-gap energy of a semiconductor ? (A) Minimum energy required to break a covalent bond (B) On breaking of the bond, electron is generated (C) On breaking of the bond, electron-hole pair is generated (D) A & C both are true

Description : The coefficient of reflection for current wave is

Last Answer : The coefficient of reflection for current wave is 1 or -1

Description : The velocity of travelling wave through a cable of relative permittivity 36 is

Last Answer : The velocity of travelling wave through a cable of relative permittivity 36 is 0.5 x 108 m/sec

Description : The average life of neutrons after they decay is

Last Answer : The average life of neutrons after they decay is 10 sec

Description : Which of the following statements is not characteristic of a static magnetic field? (A) It is solenoidal. (B) It is conservative. (C) It has no sinks or sources. (D) Flux lines are always closed.

Last Answer : Which of the following statements is not characteristic of a static magnetic field? (A) It is solenoidal. (B) It is conservative. (C) It has no sinks or sources. (D) Flux lines are always closed.

Description : At very high temperatures, extrinsic semiconductor becomes intrinsic semiconductor because (A) Of drive in diffusion of dopants & carriers. (B) Band to band transition dominates impurity ionization. (C) ... band to band transition. (D) Band to band transition is balanced by impurity ionisation.

Last Answer : At very high temperatures, extrinsic semiconductor becomes intrinsic semiconductor because Impurity ionization dominates band to band transition.

Description : A radioactive isotope has a half-life of 10 days. If today there are 125 g of it left, what was its original weight 40 days earlier  (a) 600 g (b) 1000 g (c) 1250 g (d) 2000 g 

Last Answer : Half life = 10days  The formula which is, 1/(2)^n × original weight = Weight left today.  To obtain the value of n = divide no of days by half life ie.,n= 40/10= 4 n=4 So, 1/(2)^n × original Weight = 125g 1/(2)^4 × Original weight = 125 Original weight = 16×125 = 2000g

Description : X-rays are used for the study of crystal structure because  (a) X-rays are completely absorbed by the crystal (b) the wavelength of X-ray is of the same order of magnitude in the inter ... in comparison with the inter-atomic spacing in crystals (d) the crystals are completely transparent to X-rays

Last Answer : the wavelength of X-ray is of the same order of magnitude in the inter atomic spacing in crystals 

Last Answer : A semiconductor is formed by Covalent bonds.

Last Answer : Difference between watt and volt and ampere is as follows: Watt Volt Ampere Watt is the unit of power. Volt is the unit of voltage. Ampere is the unit of current. Watts= Volts x Amperes Volts= Watts/ ...

Description : The reason for supercharging in any engine is to be A. increase efficiency B. increase power C. effect fuel economy D. reduce weight and bulk for a given output

Last Answer : ANSWER : D

Description : What is the primary advantage of bulk-effect devices over normal pn-junction semiconductors?

Last Answer : Larger microwave power outputs.

Description : When `O_(2)` is adsorbed on a metallic surface, electron transfer electron transfer occurs from the metal to `O_(2).` The TRUE statement (s) regarding

Last Answer : When `O_(2)` is adsorbed on a metallic surface, electron transfer electron transfer occurs from the metal ... D. bong length of `O_(2)` is increased

Description : Reaction between X and Y forms compound Z. X loses electron and Y gains electron. Which of the following properties is not shown by Z? A) Has high melting point B) Has low melting point C) Conducts electricity in molten state D) Occurs as solid

Last Answer : B) Has low melting point

Description : Electron-withdrawing groups are meta directors because : (a) the carbonium ion intermediate has a negative charge on the meta position. (b) the more stable resonance hybrid occurs with meta ... the electrophile. (d) the carbonium ion intermediate has a positive charge on the meta position

Last Answer : the more stable resonance hybrid occurs with meta attachment of the electrophile.

Description : Assertion: Phenol is more reactive than benzene towards electrophilic reactions. Reason : The +R effect of OH group increases the electron density on

Last Answer : Assertion: Phenol is more reactive than benzene towards electrophilic reactions. Reason : The +R effect of ... D. A is incorrect but R is correct

Description : Emerson’s enhancement effect and Red drop have been instrumental in the discovery of (a) photophosphorylation and cyclic electron transport (b) oxidative phosphorylation (c) photophosphorylation and non-cyclic electron transport (d) two photosystems operating simultaneously.

Last Answer : (d) two photosystems operating simultaneously.

Description : Acetamide is a much weaker base than ammonia. This is because (a) the electron withdrawing effect of the C=O group makes the lone pair of electrons on nitrogen atom less available for protonation. (b) ) ... NH2 group. (d) an H atom from the nitrogen is less easily lost from CH3CONH2 than from NH3.

Last Answer : the electron withdrawing effect of the C=O group makes the lone pair of electrons on nitrogen atom less available for protonation

Description : The greater acidity of carboxylic acids compared to alcohols arises primarily from : (a) the electron-donating effect of the hydroxyl group (b) the electron-withdrawing effect of the carboxyl ... of α-hydrogens of carboxylic acids (d) the resonance stability associated with the carboxylate ion

Last Answer : the resonance stability associated with the carboxylate ion

Description : What effect does closer spacing of plates have on the electron beam?

Last Answer : A greater deflection angle.

Description : What effect does closer spacing of plates have on the electron beam?

Last Answer : A greater deflection angle.

Description : What effect do longer deflection plates have on the electron beam?

Last Answer : A greater deflection angle.