________ is an electric noise produced by thermal agitation of electrons in conductor and semiconductor. A. External noise B. Internal noise C. Thermal noise D. Flicker

________ is an electric noise produced by thermal agitation of electrons in conductor and
semiconductor.
A. External noise
B. Internal noise
C. Thermal noise
D. Flicker
by

1 Answer

Answer :

C. Thermal noise
by

Related questions

Considered as the main source of an internal noise. A. Device imperfection B. Thermal agitation C. Temperature change D. Flicker

Description : Considered as the main source of an internal noise. A. Device imperfection B. Thermal agitation C. Temperature change D. Flicker

Last Answer : B. Thermal agitation

Noise caused by the thermal agitation of electrons in resistance. A. All of these B. Thermal noise C. Johnson’s noise D. White noise

Description : Noise caused by the thermal agitation of electrons in resistance. A. All of these B. Thermal noise C. Johnson’s noise D. White noise

Last Answer : A. All of these

Most internal noise comes from A. Shot noise B. Transit-time noise C. Thermal agitation D. Skin effect

Description : Most internal noise comes from A. Shot noise B. Transit-time noise C. Thermal agitation D. Skin effect

Last Answer : C. Thermal agitation

The random and unpredictable electric signal from natural causes, both internal and external to the system is know as ________. A. Distortion B. Noise C. Attenuation D. Interference

Description : The random and unpredictable electric signal from natural causes, both internal and external to the system is know as ________. A. Distortion B. Noise C. Attenuation D. Interference

Last Answer : B. Noise

What is the reliable measurement for comparing amplifier noise characteristics? A. Thermal agitation noise B. Noise factor C. Noise margin D. Signal-to-noise

Description : What is the reliable measurement for comparing amplifier noise characteristics? A. Thermal agitation noise B. Noise factor C. Noise margin D. Signal-to-noise

Last Answer : B. Noise factor

What noise is a transient short-duration disturbance distributed essentially uniformly over the useful passband of a transmission system? A. Flicker noise B. Transit-time noise C. Shot noise D. Impulse noise

Description : What noise is a transient short-duration disturbance distributed essentially uniformly over the useful passband of a transmission system? A. Flicker noise B. Transit-time noise C. Shot noise D. Impulse noise

Last Answer : D. Impulse noise

Flicker noise is a poorly understood form of noise which may be completely ignored about above ____. A.100 Hz B. 200 Hz C. 400 Hz D. 500 Hz

Description : Flicker noise is a poorly understood form of noise which may be completely ignored about above ____. A.100 Hz B. 200 Hz C. 400 Hz D. 500 Hz

Last Answer : D. 500 Hz

_________ is the random and unpredictable electric signals from natural causes, both internal and external to the system. A. Interference B. Attenuation C. Distortion D. Noise

Description : _________ is the random and unpredictable electric signals from natural causes, both internal and external to the system. A. Interference B. Attenuation C. Distortion D. Noise

Last Answer : D. Noise

External noise originating outside the solar system A. Cosmic noise B. Solar noise C. Thermal noise D. Lunar noise

Description : External noise originating outside the solar system A. Cosmic noise B. Solar noise C. Thermal noise D. Lunar noise

Last Answer : A. Cosmic noise

Noise from random acoustic or electric noise that has equal energy per cycle over a specified total frequency band. A. Gaussian noise B. Whiter noise C. Thermal noise D. All of the above

Description : Noise from random acoustic or electric noise that has equal energy per cycle over a specified total frequency band. A. Gaussian noise B. Whiter noise C. Thermal noise D. All of the above

Last Answer : D. All of the above

Noise from random acoustic or electric noise that has equal per cycle over a specified total frequency band. A. Thermal noise B. White noise C. Gaussian noise D. All of these

Description : Noise from random acoustic or electric noise that has equal per cycle over a specified total frequency band. A. Thermal noise B. White noise C. Gaussian noise D. All of these

Last Answer : D. All of these

The random motion of holes and free electrons due to thermal agitation is called ……….

Last Answer : The random motion of holes and free electrons due to thermal agitation is called Diffusion.

Photoelectric electricity is produced directly from solar energy when which of the following are absorbed in a semiconductor to create an electric current? w) protons x) electrons y) neutrons z) photons

Description : Photoelectric electricity is produced directly from solar energy when which of the following are absorbed in a semiconductor to create an electric current? w) protons x) electrons y) neutrons z) photons

Last Answer : ANSWER: Z -- PHOTONS

A noise whose source is within the solar system. A. Solar noise B. Thermal noise C. Cosmic noise D. Johnson Noise

Description : A noise whose source is within the solar system. A. Solar noise B. Thermal noise C. Cosmic noise D. Johnson Noise

Last Answer : A. Solar noise

Crosstalk due to incomplete suppression of sidebands or to intermodulation of two or more frequency-multiplexed channels which is unintelligible is classified as A. Impulse noise B. Thermal noise C. Quantizing noise D. Miscellaneous noise

Description : Crosstalk due to incomplete suppression of sidebands or to intermodulation of two or more frequency-multiplexed channels which is unintelligible is classified as A. Impulse noise B. Thermal noise C. Quantizing noise D. Miscellaneous noise

Last Answer : D. Miscellaneous noise

Noise occurring in the presence of signal resulting from a mismatch between the exact value of an analog signal and the closet available quantizing step in a digital coder. A. Quantizing noise B. Thermal noise C. Impulse noise D. Crosstalk

Description : Noise occurring in the presence of signal resulting from a mismatch between the exact value of an analog signal and the closet available quantizing step in a digital coder. A. Quantizing noise B. Thermal noise C. Impulse noise D. Crosstalk

Last Answer : A. Quantizing noise

The square of the thermal noise voltage generated by a resistor is proportional to A. its resistance B. its temperature C. the bandwidth over which it is measured D. All of the above

Description : The square of the thermal noise voltage generated by a resistor is proportional to A. its resistance B. its temperature C. the bandwidth over which it is measured D. All of the above

Last Answer : D. All of the above

Indicate the false statement. A. HF mixer are generally noisier than HF amplifiers. B. Impulse noise voltage is dependent on bandwidth C. Thermal noise is independent of the frequency at which is measured. D. Industrial noise is usually of the impulse type.

Description : Indicate the false statement. A. HF mixer are generally noisier than HF amplifiers. B. Impulse noise voltage is dependent on bandwidth C. Thermal noise is independent of the frequency at which is measured. D. Industrial noise is usually of the impulse type.

Last Answer : B. Impulse noise voltage is dependent on bandwidth

The value of the resistor creating thermal noise is doubled. The noise power generated is therefore. A. halved B. quadrupled C. doubled D. unchanged

Description : The value of the resistor creating thermal noise is doubled. The noise power generated is therefore. A. halved B. quadrupled C. doubled D. unchanged

Last Answer : D. unchanged

Two resistors, 20kΩ, and 50kΩ are at ambient temperature. Calculate for a bandwidth equal to 100kHz, the thermal noise voltage for the two resistors connected in parallel. A. 0.4782µV B. 4278 µV C. 4.78 µV D. 47.8 µV

Description : Two resistors, 20kΩ, and 50kΩ are at ambient temperature. Calculate for a bandwidth equal to 100kHz, the thermal noise voltage for the two resistors connected in parallel. A. 0.4782µV B. 4278 µV C. 4.78 µV D. 47.8 µV

Last Answer : C. 4.78 µV

C. Thermal noise D. Gaussian noise 24. ECE Board Ex

Description : Background noise is the same as the C. Thermal noise D. Gaussian noise 24. ECE Board Ex

Last Answer : A. Impulse noise

External noise fields are measured in terms of _______. A. rms values B. dc values C. average values D. peak values

Description : External noise fields are measured in terms of _______. A. rms values B. dc values C. average values D. peak values

Last Answer : D. peak values

Noise always affects the signal in a communications systems at the ________. A. transmitter B. channel C. information source D. destination

Description : Noise always affects the signal in a communications systems at the ________. A. transmitter B. channel C. information source D. destination

Last Answer : B. channel

________ sets a limit on the maximum capacity of a channel with a give noise level. A. Hartley theorem B. Shannon-Hartley theorem C. Nyquist theorem D. Shannon theorem

Description : ________ sets a limit on the maximum capacity of a channel with a give noise level. A. Hartley theorem B. Shannon-Hartley theorem C. Nyquist theorem D. Shannon theorem

Last Answer : B. Shannon-Hartley theorem

ECE Board Exam March 1996 The characteristics impedance of a transmission line does not depend upon its ________. A. conductor spacing B. conductor diameter C. length D. conductor radius

Description : ECE Board Exam March 1996 The characteristics impedance of a transmission line does not depend upon its ________. A. conductor spacing B. conductor diameter C. length D. conductor radius

Last Answer : C. length

___________ is device that measures the internal open circuit voltage of an equivalent noise generator having an impedance of 600Ω and delivering noise power to a 600 Ω load. A. Psophometer B. Barometer C. Reflectometer D. Voltmeter

Description : ___________ is device that measures the internal open circuit voltage of an equivalent noise generator having an impedance of 600Ω and delivering noise power to a 600 Ω load. A. Psophometer B. Barometer C. Reflectometer D. Voltmeter

Last Answer : A. Psophometer

Name one or more sources of noise bearing on electronic communications. A. Steam boiler B. Galaxies C. Internal combustion engine D. Both B and C

Description : Name one or more sources of noise bearing on electronic communications. A. Steam boiler B. Galaxies C. Internal combustion engine D. Both B and C

Last Answer : D. Both B and C

When no signal is being received, the loudspeaker is not entirely silent as a result of the presence of A. parasitic oscillations in some of the receiver stages. B. negative feedback in each stage. C. spurious frequencies as a result of improper neutralization. D. internal receiver noise.

Description : When no signal is being received, the loudspeaker is not entirely silent as a result of the presence of A. parasitic oscillations in some of the receiver stages. B. negative feedback in each stage. C. spurious frequencies as a result of improper neutralization. D. internal receiver noise.

Last Answer : D. internal receiver noise.

A pure semiconductor under ordinary conditions behaves like (A) a conductor. (B) an insulator. (C) a magnetic material. (D) a ferro-electric material.

Description : A pure semiconductor under ordinary conditions behaves like (A) a conductor. (B) an insulator. (C) a magnetic material. (D) a ferro-electric material.

Last Answer : (B) an insulator.

The following are true about electro-retinography? a. flicker ERG can be used to test cone function b. ERG is normal in patient with macular degeneration c. the a-wave of ERG is produced by the ganglion cells d. the b-wave is produced by the photoreceptor cell

Description : The following are true about electro-retinography? a. flicker ERG can be used to test cone function b. ERG is normal in patient with macular degeneration c. the a-wave of ERG is produced by the ganglion cells d. the b-wave is produced by the photoreceptor cell

Last Answer : flicker ERG can be used to test cone function

Which noise is produced by lighting discharges in thunderstorms? A. White noise B. Extraterrestrial noise C. Industrial noise D. Atmospheric noise

Description : Which noise is produced by lighting discharges in thunderstorms? A. White noise B. Extraterrestrial noise C. Industrial noise D. Atmospheric noise

Last Answer : D. Atmospheric noise

Which of the following is not a source of industrial noise? A. Automobile ignition B. Sun C. Electric Motors D. Leakage from high voltage line

Description : Which of the following is not a source of industrial noise? A. Automobile ignition B. Sun C. Electric Motors D. Leakage from high voltage line

Last Answer : B. Sun

Indicate the false statement. A. Industrial noise is usually of the impulse type B. Static is caused by lightning discharges in thunderstorms and other natural electric disturbances occurring in the atmosphere C. Distant stars are another source of man-made noise D. Flourescent lights are another source of man-made noise

Description : Indicate the false statement. A. Industrial noise is usually of the impulse type B. Static is caused by lightning discharges in thunderstorms and other natural electric disturbances occurring in the ... another source of man-made noise D. Flourescent lights are another source of man-made noise

Last Answer : C. Distant stars are another source of man-made noise

An advantage of optic fiber rejecting an induced noise signals from magnetic field or solar storms flux. A. Electric hazard B. Cross talk C. Immunity to noise D. Shielding

Description : An advantage of optic fiber rejecting an induced noise signals from magnetic field or solar storms flux. A. Electric hazard B. Cross talk C. Immunity to noise D. Shielding

Last Answer : C. Immunity to noise

Power consumption during turbulent flow in agitation tank is proportional to the __________ of the liquid. (A) Viscosity (B) Thermal conductivity(C) Surface tension(D) Density

Description : Power consumption during turbulent flow in agitation tank is proportional to the __________ of the liquid. (A) Viscosity (B) Thermal conductivity (C) Surface tension (D) Density

Last Answer : (D) Density

Forward current through a semi-conductor diode circuit is due to ________ (a) Minority carriers (b) majority carriers (c) holes (d) electrons

Description : Forward current through a semi-conductor diode circuit is due to ________ (a) Minority carriers (b) majority carriers (c) holes (d) electrons

Last Answer : (b) majority carriers

An electromagnetic wave is ________ polarized when the electric field lies wholly in one plane containing the direction of propagation. A. Horizontally B. Linearly C. Circularly D. Vertically

Description : An electromagnetic wave is ________ polarized when the electric field lies wholly in one plane containing the direction of propagation. A. Horizontally B. Linearly C. Circularly D. Vertically

Last Answer : B. Linearly

Internal and external factors that affect message reception by the students in the classroom are referred to as (A) feedback (B) fragmentation (C) channelization (D) noise

Description : Internal and external factors that affect message reception by the students in the classroom are referred to as (A) feedback (B) fragmentation (C) channelization (D) noise

Last Answer : Answer: D

Which type of laser is the simplest to modulate directly by changing its excitation? a. Semiconductor b. Ruby c. Helium-neon d. Neodymium-YAG

Description : Which type of laser is the simplest to modulate directly by changing its excitation? a. Semiconductor b. Ruby c. Helium-neon d. Neodymium-YAG

Last Answer : a. Semiconductor

Which type of laser is the simplest to modulate directly by changing its excitation? a. Semiconductor b. Ruby c. Helium-neon d. Neodymium-YAG

Description : Which type of laser is the simplest to modulate directly by changing its excitation? a. Semiconductor b. Ruby c. Helium-neon d. Neodymium-YAG

Last Answer : a. Semiconductor

Differentiate between intrinsic and extrinsic semiconductor

Description : Differentiate between intrinsic and extrinsic semiconductor

Last Answer : Pure form of semiconductors are said to be intrinsic semiconductor. Ex: germanium, silicon. It has poor conductivity If certain amount of impurity atom is added to intrinsic semiconductor the resulting semiconductor is Extrinsic or impure Semiconductor It has good conductivity.

It is the made from semiconductor material such as aluminum-galium-arsenide or gallium-arsenide-phosphide. A. APD B. Injection laser diode C. Light emitting diode D. Positive-intrinsic-negative

Description : It is the made from semiconductor material such as aluminum-galium-arsenide or gallium-arsenide-phosphide. A. APD B. Injection laser diode C. Light emitting diode D. Positive-intrinsic-negative

Last Answer : C. Light emitting diode

What is material used in making semiconductor?

Description : What is material used in making semiconductor?

Last Answer : Silicon & Germanium are the raw materials used for making semiconductor. Semiconductors are located between conductors & insulators in the resistivity spectrum & allow current to flow only under certain conditions.

Electric current is the flow of electrons through a conductor; the rate of this flow is measured in ___________. A. volts B. amperes C. coulombs D. ohms

Description : Electric current is the flow of electrons through a conductor; the rate of this flow is measured in ___________. A. volts B. amperes C. coulombs D. ohms

Last Answer : Answer: B

Electric current is the flow of electrons through a conductor. The rate of this flow is measured as ___________. A. volts/watt B. amperes/centimetre C. coulombs/second D. ohms/volt

Description : Electric current is the flow of electrons through a conductor. The rate of this flow is measured as ___________. A. volts/watt B. amperes/centimetre C. coulombs/second D. ohms/volt

Last Answer : Answer: C

The force that causes free electrons to move in a conductor as electric current flow is called a/an _____________. A. resistant force B. electromotive force C. inductive force D. dielectric force

Description : The force that causes free electrons to move in a conductor as electric current flow is called a/an _____________. A. resistant force B. electromotive force C. inductive force D. dielectric force

Last Answer : Answer: B

A semi-conductor is damaged & behaves like a conductor, on passing a strong electric current through it, because it heats up the crystals & breaks the covalent bonds resulting in __________ electrons. (A) Lack of free (B) Excess of (C) Decrease in (D) None of these

Description : A semi-conductor is damaged & behaves like a conductor, on passing a strong electric current through it, because it heats up the crystals & breaks the covalent bonds resulting in __________ electrons. (A) Lack of free (B) Excess of (C) Decrease in (D) None of these

Last Answer : (B) Excess of

What are Shiny element which is a good conductor of thermal energy and electric current?

Description : What are Shiny element which is a good conductor of thermal energy and electric current?

Last Answer : Need answer

The definition of ________ prices is: In considering an observed price, consumers often compare it to an internal memory reference price or an external frame of reference (such as a posted “regular retail price”). A. Historical B. Reference C. Promotional D. Everyday low price E. None of the above

Description : The definition of ________ prices is: In considering an observed price, consumers often compare it to an internal memory reference price or an external frame of reference (such as a posted regular retail price ) ... B. Reference C. Promotional D. Everyday low price E. None of the above

Last Answer : B. Reference

Stilton is a – (1) Semiconductor (2) Insulator (3) Nonconductor (4) Conductor

Description : Stilton is a – (1) Semiconductor (2) Insulator (3) Nonconductor (4) Conductor

Last Answer : (1) Semiconductor Explanation: Silicon is a chemical element with the symbol Si and its atomic number is 14. Over 90 percent of the Earth's crust is composed of silicate minerals. Highly purified silicon is used in semiconductor electronics.