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

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.

In any atom the potential energy of an orbiting electron is

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

In which material, valence electrons are tightly bounded to their parent atoms ?

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)

Form the hot metal surface electrons escape because

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

On heating, Gypsum loses certain percentage of its water content and becomes (1) Chalk (2) Calcium sulphate (3) Plaster of Paris (4) a pearl

Description : On heating, Gypsum loses certain percentage of its water content and becomes (1) Chalk (2) Calcium sulphate (3) Plaster of Paris (4) a pearl

Last Answer : (3) Plaster of Paris Explanation: Plaster of paris, quick-setting gypsum plaster consisting of a fine white powder (calcium sulfate hemihydrate), which hardens when moistened and allowed to dry.

Curie point is the temperature at which (1) Matter becomes radioactive (2) A metal loses magnetic properties (3) A metal loses conductivity (4) Transmutation of metal occurs

Description : Curie point is the temperature at which (1) Matter becomes radioactive (2) A metal loses magnetic properties (3) A metal loses conductivity (4) Transmutation of metal occurs

Last Answer : (2) A metal loses magnetic properties Explanation: In physics and materials science, the Curie temperature (TO, or Curie point, is the temperature at which a ferromagnetic or a ... in piezoelectric materials to refer to the temperature at which spontaneous polarization is lost on heating.

Curie point is the temperature at which (1) Matter becomes radioactive (2) A metal loses magnetic properties. (3) A metal loses conductivity (4) Transmutation of metal occurs.

Description : Curie point is the temperature at which (1) Matter becomes radioactive (2) A metal loses magnetic properties. (3) A metal loses conductivity (4) Transmutation of metal occurs.

Last Answer : A metal loses magnetic properties.

What do you think happened to the size of an atom when the atom loses an electron?

Description : What do you think happened to the size of an atom when the atom loses an electron?

Last Answer : The atom would stay the same size because it would still have the same amount of energy levels. The mass of the atom would be slightly less though.No, an atom shrinks when loosing an electron.There ... by the same number of protons ('+'charges) in nucleus, so the atraction per electron is stronger.

An electron collides with a fixed hydrogen atom in its ground state. Hydrogen atom gets excited and the colliding electron loses all its kinetic energ

Description : An electron collides with a fixed hydrogen atom in its ground state. Hydrogen atom gets excited and the colliding electron loses all its kinetic energ

Last Answer : An electron collides with a fixed hydrogen atom in its ground state. Hydrogen atom gets excited and the colliding ... eV C. 12.1 eV D. 13.6 eV

Which of the 3rd period elements loses electrons most readily? w) Sodium x) Magnesium y) Aluminum z) Silicon

Description : Which of the 3rd period elements loses electrons most readily? w) Sodium x) Magnesium y) Aluminum z) Silicon

Last Answer : ANSWER: A-SODIUM

A knitting factory worker who loses her job because the company has relocated the plant to another country is an example of _____.?

Description : A knitting factory worker who loses her job because the company has relocated the plant to another country is an example of _____.?

Last Answer : structural unemployment

The carbon atom wh ich becomes asymmetric when the straight chain form of monosaccharide changes into ring form is known as CARBOHYDRATES AND CARBOHYDRATE METABOLISM 9 (A) Anomeric carbon atom (B) Epimeric carbon atom (C) Isomeric carbon atom (D) None of these

Description : The carbon atom wh ich becomes asymmetric when the straight chain form of monosaccharide changes into ring form is known as CARBOHYDRATES AND CARBOHYDRATE METABOLISM 9 (A) Anomeric carbon atom (B) Epimeric carbon atom (C) Isomeric carbon atom (D) None of these

Last Answer : A

Chlorine atom becomes a chloride ion by (a) Losing an electron (b) Gaining an electron (c) Sharing its electron with another element (d) Gaining a neutron

Description : Chlorine atom becomes a chloride ion by (a) Losing an electron (b) Gaining an electron (c) Sharing its electron with another element (d) Gaining a neutron

Last Answer : Ans:(b)

The correct order of electromagnetic spectrum with decreasing frequency is:

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

Ferrites are types of

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.

If temperature of a pure silicon specimen is increased, then

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.

A material has conductivity of 10–2 mho/m and relative permittivity of 4. The frequency at which the

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

A cable has an insulation of relative permittivity 2. If the insulation is replaced by one of relative permittivity

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

Three materials X, Y and Z having relative permittivity 2.5, 3.0 and 4.0 respectively are used in a single core

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

The transferred electron bulk effect occurs in

Description : The transferred electron bulk effect occurs in

Last Answer : The transferred electron bulk effect occurs in Gallium Arsenide

A compact microstrip antenna may be obtained by

Description : A compact microstrip antenna may be obtained by

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

Frequency is inherently a physical quantity with characteristics.

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

The degree of coupling depends

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

At a particular temperature and current density, the critical magnetic field for a Type I superconductor is Bc

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

In order to generate electron-hole pairs, the maximum wavelength of radiation for Silicon (Band gap = 1.1 eV)

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

In a metal wire, which particle carries electric current?

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.

Silicon dioxide is

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

A forward-biased PN-junction,

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

In a PN-junction with open circuit terminal (equilibrium), with P doping higher as compared to N

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

Which of the following is true regarding the band-gap energy of a semiconductor ?

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

The coefficient of reflection for current wave is

Description : The coefficient of reflection for current wave is

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

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

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

The average life of neutrons after they decay is

Description : The average life of neutrons after they decay is

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

Which of the following statements is not characteristic of a static magnetic field?

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.

A radioactive isotope has a half-life of 10 days. If today there are 125 g of it left, what was its original weight...

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

X-rays are used for the study of crystal structure because...

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

A semiconductor is formed by ……… bonds.

Last Answer : A semiconductor is formed by Covalent bonds.

What is the difference between watt volt and ampere?

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/ ...

What is the charge and mass of an electron?

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

In a dry cell the carbon rod releases electrons and becomes what kind of terminal?

Description : In a dry cell the carbon rod releases electrons and becomes what kind of terminal?

Last Answer : Need answer

In which type of bond are one or more electrons transferred from one atom to another?

Description : In which type of bond are one or more electrons transferred from one atom to another?

Last Answer : Need answer

What is the atom in a molecule of water that is more visited by the shared electrons?

Description : What is the atom in a molecule of water that is more visited by the shared electrons?

Last Answer : Oxygen has a low negative charge.

Why does sulfur dioxide have 10 electrons on central atom when that is more than 8. I don't understand how it can violate the rule?

Description : Why does sulfur dioxide have 10 electrons on central atom when that is more than 8. I don't understand how it can violate the rule?

Last Answer : The octet rule is a simplification, not a hard and fast rule. We use it to help students at the start of their studies of bonding. When sulfur forms more bonds, more energy is released. resulting in a more stable situation.

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) ) the electron withdrawing effect of the C=O group makes the lone pair of electrons on nitrogen atom more available for protonation. (c) the presence of CH3 group sterically hinders the protonation of the NH2 group. (d) an H atom from the nitrogen is less easily lost from CH3CONH2 than from NH3.

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

Which of the following statements are correct concerning delocalized electrons? (a) Electrons do not belong to a single atom. (b) Electrons are not confined to a bond between two atoms (c) Electrons are shared by three or more atoms.(d) (a), (b) and (c)

Description : Which of the following statements are correct concerning delocalized electrons? (a) Electrons do not belong to a single atom. (b) Electrons are not confined to a bond between two atoms (c) Electrons are shared by three or more atoms. (d) (a), (b) and (c)

Last Answer : (d) (a), (b) and (c)

anonymous · Answer 1 · 2018-05-29T17:06:18+0000

If an atom loses one or more electrons, it becomes electrically positive

gabriel orina · Answer 2 · 2018-08-11T05:47:38+0000

Answer :

It becomes positively charged atom.

answered Aug 11, 2018 by gabriel orina

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

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