Why cant there be hole current in the conduction band?

Why cant there be hole current in the conduction band?
by

1 Answer

Answer :

Feel Free to Answer
by

Related questions

In a conductor – (1) there is no conduction band (2) the forbidden energy gap is very wide (3) the forbidden energy gap is very narrow (4) the valence band and the conduction band overlap each other

Description : In a conductor – (1) there is no conduction band (2) the forbidden energy gap is very wide (3) the forbidden energy gap is very narrow (4) the valence band and the conduction band overlap each other

Last Answer : (4) the valence band and the conduction band overlap each other Explanation: In the case of a conductor, there is no forbidden energy gap. The conduction and valence energy bands overlap ... , the electrons from the valence band can freely enter the conduction energy band. Conduction energy band

For conductors, the free electrons will exist at a) Valence band b) Middle of valence and conduction band c) Will not exist d) Conduction band

Description : For conductors, the free electrons will exist at a) Valence band b) Middle of valence and conduction band c) Will not exist d) Conduction band

Last Answer : d) Conduction band

What happens to the electrons of a gallium-arsenide semiconductor when they move from the normal low-energy conduction band to the high-energy conduction band?

Description : What happens to the electrons of a gallium-arsenide semiconductor when they move from the normal low-energy conduction band to the high-energy conduction band?

Last Answer : The electrons become immobile.

The band above the valance band is called: a) Conduction band b) Filled band c) Forbidden band d) occupied band

Description : The band above the valance band is called: a) Conduction band b) Filled band c) Forbidden band d) occupied band

Last Answer : a) Conduction band

Insulators have (A) A full valence band. (B) An empty conduction band. (C) A large energy gap. (D) All the above.

Description : Insulators have (A) A full valence band. (B) An empty conduction band. (C) A large energy gap. (D) All the above.

Last Answer : (C) A large energy gap.

C and Si both have same lattice structure, having 4 bonding electrons in each. However, C is insulator where as Si is intrinsic semiconductor. This is because (1) The four bonding electrons in the case of C lie in the third orbit, whereas for Si they lie in the fourth orbit (2) In case of C the valance band is not completely filled at absolute zero temperature (3) In case of C the conduction band is partly filled even at absolute zero temperature (4) The four bonding electrons in the case of C lie in the second orbit, whereas in the case of Si they lie in the third

Description : C and Si both have same lattice structure, having 4 bonding electrons in each. However, C is insulator where as Si is intrinsic semiconductor. This is because (1) The four bonding electrons in the case of C ... the case of C lie in the second orbit, whereas in the case of Si they lie in the third

Last Answer : (4) The four bonding electrons in the case of C lie in the second orbit, whereas in the case of Si they lie in the third

Conduction band electrons have more mobility than holes because they (1) are lighter (2) experience collision less frequently (3) have negative charge (4) need less energy to move them

Description : Conduction band electrons have more mobility than holes because they (1) are lighter (2) experience collision less frequently (3) have negative charge (4) need less energy to move them

Last Answer :  experience collision less frequently

In a conductor (1) there is no conduction band (2) the forbidden energy gap is very wide (3) the forbidden energy gap is very narrow (4) the valence band and the conduction band overlap each other

Description : In a conductor (1) there is no conduction band (2) the forbidden energy gap is very wide (3) the forbidden energy gap is very narrow (4) the valence band and the conduction band overlap each other

Last Answer : the valence band and the conduction band overlap each other

Define: i) Conduction band ii) Forbidden band iii) Valance band iv) Doping

Description : Define: i) Conduction band ii) Forbidden band iii) Valance band iv) Doping

Last Answer : i) Conduction band: The energy band containing conducting electrons is called conduction band.  ii)Forbidden band : The energy gap between conduction band and valance band is called forbidden band.  ... band.  iv)Dopping: The process of adding impurities in pure semiconductor is called dopping.

Define conduction band & forbidden energy gap.

Description : Define conduction band & forbidden energy gap. 

Last Answer : Conduction band :Range of energy possesed by conduction electrons is called conduction band.  Forbidden energy gap : The energy difference between conduction band and valance band is called forbidden energy gap.

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

Heat transfer in the laminar sub-layer in case of a liquid flowing through a pipe, is mostly by (A) Eddies current (B) Conduction (C) Convection (D) None of these

Description : Heat transfer in the laminar sub-layer in case of a liquid flowing through a pipe, is mostly by (A) Eddies current (B) Conduction (C) Convection (D) None of these

Last Answer : (B) Conduction

Find the loss tangent of a material with conduction current density of 5 units and displacement current density of 10 units. a) 2 b) 0.5 c) 5 d) 10

Description : Find the loss tangent of a material with conduction current density of 5 units and displacement current density of 10 units. a) 2 b) 0.5 c) 5 d) 10

Last Answer : b) 0.5

At high frequencies, which parameter is significant? a) Conduction current b) Displacement current c) Attenuation constant d) Phase constant

Description : At high frequencies, which parameter is significant? a) Conduction current b) Displacement current c) Attenuation constant d) Phase constant

Last Answer : b) Displacement current

Calculate the conduction current density when the resistivity of a material with an electric field of 5 units is 4.5 units. a) 22.5 b) 4.5/5 c) 5/4.5 d) 9.5

Description : Calculate the conduction current density when the resistivity of a material with an electric field of 5 units is 4.5 units. a) 22.5 b) 4.5/5 c) 5/4.5 d) 9.5

Last Answer : c) 5/4.5

The charge build up in a capacitor is due to a) Conduction current density b) Displacement current density c) Polarisation d) Magnetization

Description : The charge build up in a capacitor is due to a) Conduction current density b) Displacement current density c) Polarisation d) Magnetization

Last Answer : b) Displacement current density

The magnitude of the conduction current density for a magnetic field intensity of a vector yi + zj + xk will be a) 1.414 b) 1.732 c) -1.414 d) -1.732

Description : The magnitude of the conduction current density for a magnetic field intensity of a vector yi + zj + xk will be a) 1.414 b) 1.732 c) -1.414 d) -1.732

Last Answer : b) 1.732

Both the conduction and displacement current densities coexist in which medium? a) Only conductors in air b) Only dielectrics in air c) Conductors placed in any dielectric medium d) Both the densities can never coexist

Description : Both the conduction and displacement current densities coexist in which medium? a) Only conductors in air b) Only dielectrics in air c) Conductors placed in any dielectric medium d) Both the densities can never coexist

Last Answer : c) Conductors placed in any dielectric medium

Find the conduction current density of a material with conductivity 200units and electric field 1.5 units. a) 150 b) 30 c) 400/3 d) 300

Description : Find the conduction current density of a material with conductivity 200units and electric field 1.5 units. a) 150 b) 30 c) 400/3 d) 300

Last Answer : d) 300

The charge build up in the capacitor is due to which quantity? a) Conduction current b) Displacement current c) Convection current d) Direct current

Description : The charge build up in the capacitor is due to which quantity? a) Conduction current b) Displacement current c) Convection current d) Direct current

Last Answer : d) Direct current

When the conduction current density and displacement current density are same, the dissipation factor will be a) Zero b) Minimum c) Maximum d) Unity

Description : When the conduction current density and displacement current density are same, the dissipation factor will be a) Zero b) Minimum c) Maximum d) Unity

Last Answer : d) Unity

Calculate the electric field when the conductivity is 20 units, electron density is 2.4 units and the velocity is 10m/s. Assume the conduction and convection current densities are same. a) 2.4 b) 4.8 c) 3.6 d) 1.2

Description : Calculate the electric field when the conductivity is 20 units, electron density is 2.4 units and the velocity is 10m/s. Assume the conduction and convection current densities are same. a) 2.4 b) 4.8 c) 3.6 d) 1.2

Last Answer : d) 1.2

The ratio of conduction to displacement current density is referred to as a) Attenuation constant b) Propagation constant c) Loss tangent d) Dielectric constant

Description : The ratio of conduction to displacement current density is referred to as a) Attenuation constant b) Propagation constant c) Loss tangent d) Dielectric constant

Last Answer : c) Loss tangent

Find the conductivity of a material with conduction current density 100 units and electric field of 4 units. a) 25 b) 400 c) 0.04 d) 1600

Description : Find the conductivity of a material with conduction current density 100 units and electric field of 4 units. a) 25 b) 400 c) 0.04 d) 1600

Last Answer : a) 25

Find the conduction current density when conductivity of a material is 500 units and corresponding electric field is 2 units. a) 500 b) 250 c) 1000 d) 2000

Description : Find the conduction current density when conductivity of a material is 500 units and corresponding electric field is 2 units. a) 500 b) 250 c) 1000 d) 2000

Last Answer : c) 1000

The current flowing through an insulating medium is called a) Conduction b) Convection c) Radiation d) Susceptibility

Description : The current flowing through an insulating medium is called a) Conduction b) Convection c) Radiation d) Susceptibility

Last Answer : b) Convection

The current in a metal at any frequency is due to a) Conduction current b) Displacement current c) Both conduction and displacement current d) Neither conduction nor displacement current

Description : The current in a metal at any frequency is due to a) Conduction current b) Displacement current c) Both conduction and displacement current d) Neither conduction nor displacement current

Last Answer : a) Conduction current

Insulators perform which of the following functions? a) Conduction b) Convection c) Provide electrical insulation d) Allows current leakage at interfaces

Description : Insulators perform which of the following functions? a) Conduction b) Convection c) Provide electrical insulation d) Allows current leakage at interfaces

Last Answer : c) Provide electrical insulation

The term "laminar flow" is most often associated with the description of: w) conduction of sound by waves x) current flow in transistors y) effects of viscosity of liquids z) passage of light rays through a liquid

Description : The term "laminar flow" is most often associated with the description of: w) conduction of sound by waves x) current flow in transistors y) effects of viscosity of liquids z) passage of light rays through a liquid

Last Answer : ANSWER: Y -- EFFECTS OF VISCOSITY OF LIQUIDS

In case of semi-conductors, the ratio of conduction current to displacement current is:

Description :  In case of semi-conductors, the ratio of conduction current to displacement current is: A) more than 200 and less than 1000 B) less than 100 but greater than 1/100 C) less than 1/100 D) more than 1000

Last Answer : In case of semi-conductors, the ratio of conduction current to displacement current is:  less than 100 but greater than 1/100

The conduction loss versus device current characteristic of a power MOSFET is best approximated by

Description : The conduction loss versus device current characteristic of a power MOSFET is best approximated by (A) a parabola (B) a straight line (C) a rectangular hyperbola (D) an exponentially decaying function

Last Answer : The conduction loss versus device current characteristic of a power MOSFET is best approximated by a parabola

In a semiconductor, current conduction is due to ……..

Last Answer : In a semiconductor, current conduction is due to Holes and free electrons.

Why we see it as a black hole? Why can't it be a space with absence of visible spectrum? -Space

Description : Why we see it as a black hole? Why can't it be a space with absence of visible spectrum? -Space

Last Answer : The bending of light around a black hole is very significant because of its extremely large mass. Because of this bending, we see light from material that is behind the black hole, which we would not see if light were traveling in straight lines

For an elliptical hole on a flat plate, if width of the hole in direction of the load decrease, Stress Concentration Factor will______ a) Increase b) Decrease c) Remains constant d) Can’t be determined. Varies from material to material

Description : For an elliptical hole on a flat plate, if width of the hole in direction of the load decrease, Stress Concentration Factor will______ a) Increase b) Decrease c) Remains constant d) Can’t be determined. Varies from material to material

Last Answer : a) Increase

Why can't I import Garage Band clips of songs into iTunes?

Description : Why can't I import Garage Band clips of songs into iTunes?

Last Answer : Instead of doing that, click “Share” in the GB menu, then “send song to iTunes” (while your project is open).

Into which hole does the current tester push?

Description : To the left or to the right? Can I get a current blow if I push her into the other one?

Last Answer : looking from the outside :) to the left but at all if I use a phaser, I always try both, because I don't know which pig connected it - definitely nothing can happen to you with the phaser ... a defect or voltmeter, this measures the voltage between the socket (left or right) and zero (ground) pin

The arrow direction in the diode symbol indicates a. Direction of electron flow. b. Direction of hole flow (Direction of conventional current) c. Opposite to the direction of hole flow d. None of the above

Description : The arrow direction in the diode symbol indicates a. Direction of electron flow. b. Direction of hole flow (Direction of conventional current) c. Opposite to the direction of hole flow d. None of the above

Last Answer : b. Direction of hole flow (Direction of conventional current)