118 views
What is the charge and mass of an electron?

1 Answer

Answer :

Charge on electrons is 1.6022*10-19C

And the mass of electrons is 9.109*10-31 kg

Like 1 like

Please log in or register to answer this question.

Related questions

113 views

Description : The ratio of mass of proton to that of electron is nearly?

Last Answer : The ratio of mass of proton to that of electron is nearly 1840.

1 answer
138 views

Description : Explain with sketch electron beam welding. 

Last Answer : Electron Beam Welding Process In EBW process, the heat is generated when the electron beam impinges on work piece. As the high velocity electron beam strikes the surfaces to be welded, their kinetic ... material that is directly in the path is melted which when solidifies form the joint. 

1 answer
133 views

Description : State the different modes of electron emission in metal. Explain any two modes of emission.

Last Answer : Different modes of electron emission in metal - 1. Thermionic emission 2. Photo electric emission. 3. Field emission. 4. Secondary emission. Mode of Emission  1. Thermionic emission. ... (GaP)  Application: Electron multiplier tubes, Special amplifying tubes, Computer memory tubes. 

1 answer
208 views

Description : In a metal conductor, what is a free electron?

Last Answer :  When many atoms are close together in a copper wire, the outermost orbital electron of each copper atom can easily break free from its home or parent atom. These electrons then can migrate easily ... random. Such electrons that can move freely from one atom to the next are called free electrons.

1 answer
130 views

Description : The vertical deflection of an electron beam on the screen of a CRO is measured to be 8 mm. Now, the potential difference between the Y-plates is doubled, and simultaneously the pre-accelerating anode voltage is reduced to half of ... on the screen would become (A) 64 mm (B) 32 mm (C) 8 mm (D) 1 mm

Last Answer : The vertical deflection of an electron beam on the screen of a CRO is measured to be 8 mm. Now, the potential difference between the Y-plates is doubled, and simultaneously the pre-accelerating ... of its previous value. Then, the vertical deflection of the beam on the screen would become 32 mm

1 answer
180 views

Description : lf the wire which is vertical to this page has electron flow downwards the conductor will have

Last Answer : lf the wire which is vertical to this page has electron flow downwards the conductor will have a counter-clockwise field in the plane of the paper

1 answer
1 view

Description : Could the magnetic properties of a piece of negative mass only be realized around another piece of negative magnetic mass?

Last Answer : I think you need to define some terms here. What is negative magnetic mass ? I understand each of those words, but the combination into a phrase is essentially meaningless to me. Non-magnetic is a ... of yet. Although anti-matter has been postulated, I'm not aware of its provable existence yet.

1 answer
5 views

Description : What is the Difference between Mass and Weight?

Last Answer : Shown below are two types of scales commonly used in the classroom -a spring scale (left) and a simple balance beam scale on the right. On earth the spring scale reads 100g with an unknown mass ... spring scale read? How much mass would be needed to balance the 100g mass on the balance beam?

1 answer
71 views

Description : What is mass energy equivalence? Give one example. Define mass defect and binding energy.

Last Answer : Mass energy equivalence:-   The physical principle that a measured quantity of energy is equivalent to a measured quantity of mass. The equivalence is expressed by Einstein's equation E = mc ... of energy that must be supplied to a nucleus to completely separate its nuclear articles (nucleons)

1 answer
108 views

Description : The mass of ions in grams which is liberated or deposited by chemical action by the passage of 1 C of electricity _______ A) electrochemical force B) electrochemical voltage C) electrochemical equivalent D) none of these

Last Answer : The mass of ions in grams which is liberated or deposited by chemical action by the passage of 1 C of electricity electrochemical equivalent 

1 answer
224 views

Description : The units of moment of inertia of mass are?

Last Answer : Moment of inertia mass*velocity [Kg M T'-1]

1 answer
11 views

Description : How can the state of charge of battery is best indicated?

Last Answer : Ans. The state of charge of battery is best indicated by specific gravity of electrolyte and voltage.

1 answer
425 views

Description : A charge of 0.1 C moves past a given point every 0.01 s. How much is the current?

Last Answer : The current is 10.0A.  1ampere = 1 Coulomb per 1 second.  0.1Coulombs ÷ 0.01seconds = 10.0amperes.

1 answer
267 views

Description : What is the output voltage of a battery if 10 J of energy is expended in moving 1.25 C of charge?

0 answers
83 views

Description : Briefly describe the electric field of a static charge.

0 answers
103 views

Description : Coulomb Siemens Farad Joule

Last Answer : Correct Answer: 1. Coulomb

1 answer
64 views

Description : The state of charge of the battery is indicated by the electrolyte's :  (A) mass (B) colour (C) viscosity (D) specific gravity

Last Answer : The state of charge of the battery is indicated by the electrolyte's : specific gravity

1 answer
104 views

Description : What is the charge on each capacitor when a 150 V is applied across two capacitors with values 5 μF and 10 μF, connected in series? A) 500 μC B) 0.5 μC C) 0.5 C D) None of these

Last Answer : What is the charge on each capacitor when a 150 V is applied across two capacitors with values 5 μF and 10 μF, connected in series? A) 500 μC B) 0.5 μC C) 0.5 C D) None of these

1 answer
292 views

Description : The minimum charge on an ion is?

Last Answer : The minimum charge on an ion is equal to the charge of an electron.

1 answer
127 views

Description : How do you charge a capacitor with a battery?

Last Answer : The  capacitor  is  connected   in  parallel  with   the  battery.

1 answer
76 views

Description : Why does charge flow from positive to negative?

0 answers
67 views

Description : How the charge Carriers are created?

Last Answer : Charge Carriers are created if the electrons is removed from atom .

1 answer
230 views

Description : The transferred electron bulk effect occurs in

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

1 answer
153 views

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 

1 answer
163 views

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

1 answer
0 views

Description : There is a uniform electric field E between two parallel plates. An electron moving perpendicular to the field enters with velocity V. Assuming the force of gravity to be negligible, derive an expression for ... of the electron when emerging from the plates. Charge of the electron in e and mass m.

0 answers
0 views

Description : An electron of mass m and charge e initially at rest gets accelerated by a constant field E. The rate of change of a deBroglie wavelength of the electron with time is given by (relativistic variation of mass with time is to be ignored). (1) cht/m (2) h/eE2 (3) h/eEt (4) -mh/eEt2

0 answers
0 views

Description : Imagine an atom made up of a proton and a hypotheticle particle of double the mass of electron but having the same charge as that of the electron. Apply the Bohr atom model and consider all possible transition of the hypothetical particle to the ... λ will be (1) 1.8 R (2) 7.2 R (3) 3.6 R (4) 4/R

0 answers
0 views

Description : An electron is moving with a velocity of `10^(7) m s^(-1)`. Find its energy in electron volts. (Mass of electron `=9.1xx10^(-31) kg` and charge of ele

Last Answer : An electron is moving with a velocity of `10^(7) m s^(-1)`. Find its energy in electron volts. (Mass ... ` and charge of electron `=1.6xx10^(-19) C`)

1 answer
0 views

Description : What is the Particle in a nucleus of an atom it has a positive electrical charge and it's 2000 times the mass of the electron?

Last Answer : protonthere is no such thing as an electrical charged nut there issuch a thing as a charged particle, that is also known asneutron

1 answer
1 view

Description : The nuclear particle having no mass and no charge, but only spin is - (1) proton (2) neutrino (3) meson (4) electron

Last Answer : (2) neutrino Explanation: Neutrinos do not carry electric charge, and have mass quite small, though nonzero. Their mass is tiny even by the standards of subatomic particles. They are electrically neutral, weakly interacting elementary subatomic particles with half-integer spin.

1 answer
11 views

Description : In Rutherford's experiment involving the deflection of alpha particles by atomic nuclei, the fact that some of the alpha particles bombarding the thin gold foil were back-scattered, led to one of the ... its nucleus z) the nucleus of a gold atom occupies nearly the entire space of the atom

Last Answer : ANSWER: Y -- MOST OF THE MASS OF A GOLD ATOM IS IN ITS NUCLEUS

1 answer
42 views

Description : Alpha rays are different from beta rays in one of the following ways. Are they different since: w) alpha rays are deflected in a magnetic field and beta rays are not x) alpha rays are ... negative charge z) alpha rays are produced within the nucleus and beta rays are produced outside the nucleus 

Last Answer : ANSWER: Y -- ALPHA RAYS HAVE A POSITIVE CHARGE AND BETA RAYS HAVE A NEGATIVE CHARGE

1 answer
17 views

Description : The nuclear particle having no mass and no charge, but only spin is (1) proton (2) neutrino (3) meson (4) electron

Last Answer : neutrino

1 answer
474 views

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

Last Answer : It   becomes   positively  charged    atom.

2 answers
162 views

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 

1 answer
73 views

Description : Moving coil instruments have which one of the following scales ? (a) Logarithmic scale (b) Uniform scale (c) Non-uniform scale (d) Squared scale 

0 answers
45 views

Description : Super conducting materials can be used for (a) ore refining. (b) magnetic levitation in high speed trains. (c) medical resonance imaging. (d) All of the above  

0 answers
102 views

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.

1 answer
147 views

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)

2 answers
286 views

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.

1 answer
82 views

Description : A silicon p-n junction at a temperature of 20 °C has a reverse saturation current of 10 pA. The reverse saturation current at 40 °C will approximately be (a) 30 pA (b) 40 pA (c) 50 pA (d) 60 pA

0 answers
106 views

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

1 answer
55 views

Description : Both donor and acceptor impurities are present in the combination of (a) Phosphorous - Arsenic (b) Aluminium - Antimony (c) Boron - Gallium (d) Arsenic - Antimony

0 answers
380 views

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

1 answer
360 views

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 

1 answer
249 views

Description : If temperature of a radiating body is 1500 °C, the wavelength at which maximum radiant energy occurs is (a) 2.87 µm (b) 1.63 µm (c) 1.01 µm (d) 20.85 µm 

0 answers
51 views

Description : A compact microstrip antenna may be obtained by

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

1 answer
...