Description : The FET and the vacuum tube have what in common?
Last Answer : Voltage controls conduction.
Description : When designing vacuum-tube circuits, what characteristics of tubes must be taken into consideration?
Last Answer : Differences in performance of tubes of the same type
Description : Name the components which greatly increase the weight of vacuum-tube circuitry.
Last Answer : Transformers, capacitors, and resistors.
Description : What discovery proved to be the foundation for the development of the vacuum tube?
Last Answer : The Edison Effect.
Description : Name two functions of the base of a vacuum tube.
Last Answer : It serves as a mounting for the tube elements and as the terminal connectio
Description : On the diagram below, name the elements of the vacuum tube and their potentials relative to dc ground. time is an example of what type of transmission?
Last Answer : a. Plate, positive. b. Suppressor grid, negative.
Description : Which of the following statements comparing transistors and vacuum tubes is correct? A. Both transistors and vacuum tubes have a cathode that must be heated to give off electrons. B. A vacuum tube must ... flow. D. The anode of both transistors and vacuum tubes must be heated to give off electrons.
Last Answer : Answer: B
Description : In the tunnel diode, the tunneling current is at what level when the forbidden gap of the N-type material is at the same energy level as the empty states of the P-type material?
Last Answer : Minimum.
Description : What is the effect upon an electron that enters the buncher gap when the potential across the grids is at 0 volts?
Last Answer : There is no effect
Description : What is the primary component for a spark-gap modulator?
Last Answer : Either a fixed spark gap that uses a trigger pulse to ionize the air between the contacts, or a rotary gap that is similar to a mechanical switch.
Description : A 45-year-old solicitor had an onset of severe, crushing, substernal chest pain while attending a football match. He collapsed on his way to the car. Bystander Cardiorespiratory Resuscitation ... His oxyhemoglobin curve is shifted to the left 5) His pulmonary artery pressure is probably elevated
Last Answer : Answers-5 This young patient with severe central chest pain has probably arrested due to myocardial infarction and arrhythmia. His gases reveal high PO2 following 100% O2 but severe acidosis ... no left to right shunting and high pulmonary pressures would be expected after this arrest scenario.
Description : How did vacuum tubes cause a problem for first generation computers
Last Answer : They were unreliable, required a lot of power to run, and produced so much heat that air conditioning was needed to protect computer parts.
Description : In electronic computers, vacuum tubes were replaced by transistors and transistors have been replaced by what device?
Last Answer : Integrated circuits.
Description : Vacuum tubes are designed to operate in what portion of the Ep - Ip
Last Answer : The linear portion.
Description : What was the name of the first vacuum tube invented by Lee de Forrest in 1906 ?
Last Answer : The first vacuum tube invented by Lee de Forrest in 1906 was called Audion.
Description : Who invented the first vacuum tube ?
Last Answer : Edison was the first to invent a vacuum tube.
Description : What does a vacuum tube do ?
Last Answer : The vacuum tube acts as a rectifier
Description : The Third Generation Computer was made with . A) Vacuum Tube B) Discrete Components C) IC D) Bio Chips
Last Answer : Answer : C
Description : The purpose of vacuum tube was to NOT act like A) an amplifier B) a switch C) a router D) None of above
Description : The Second Generation Computer was based on . A) Vacuum Tube B) Silicon Chips C) Transistor D) Bio Chips
Description : When was vacuum tube invented? A) 1900 B) 1906 C) 1910 D) 1880
Last Answer : Answer : B
Description : Fourth Generation computers were based on _______ (A) IC (B) Vacuum tube (C) transistor (D) Microprocessors
Last Answer : (D) Microprocessors
Description : IC is made up of _________ (A) microprocessor (B) vacuum tube (C) transistor (D) None of the Above
Last Answer : (C) transistor
Description : Third Generation computers were based on _______ (A) IC (B) Vacuum tube (C) transistor (D) None of the Above
Last Answer : (A) IC
Description : Second Generation computers were based on _______ (A) IC (B) Vacuum tube (C) transistor (D) None of the Above
Description : Impressed current cathodic protection is used on vessels instead of _________________. A. fire alarm systems B. repeated painting C. sacrificial zincs D. vacuum tube degaussing systems
Last Answer : Answer: C
Description : The main difference between an electron tube and a transistor is the _____________. A. type of function they can perform B. reaction of electron flow through a gas or vacuum in a transistor C. ... when placed in a tube D. reaction of electron flow through a semiconductor used to form a transistor
Last Answer : Answer: D
Description : The suitable evaporator for concentration of foaming liquids is a __________ evaporator. (A) Long tube (B) Short tube (C) Vacuum (D) Falling film
Last Answer : (A) Long tube
Description : Pick out the wrong statement. (A) Heat transfer by radiation cannot occur across an absolute volume (B) In case of a shell and tube heat exchanger, the pressure drop through the shell is ... The amount of heat involved in the condensation or vaporisation of 1 kg of a fluid is the same
Last Answer : (A) Heat transfer by radiation cannot occur across an absolute volume
Description : Pick out the wrong statement: (A) The vacuum pressure is always the negative gauge pressure (B) The pressure of the liquid measured by a piezometer tube is the gauge pressure (C) Manometric ... point at which the resultant pressure on an immersed surface acts, is known as the centre of gravity
Last Answer : (D) The point at which the resultant pressure on an immersed surface acts, is known as the centre of gravity
Description : 08. The vacuum pressure can be measured with the help of a Piezometer tube. A) True B) False
Last Answer : B
Description : The pressure of a liquid measured with the help of a Piezometer tube is (A) Vacuum pressure (B) Gauge pressure (C) Absolute pressure (D) Atmospheric pressure
Last Answer : Answer: Option B
Description : A Piezometer tube is used only for measuring (A) Low pressure (B) High pressure (C) Moderate pressure (D) Vacuum pressure
Last Answer : Answer: Option C
Description : The growth of vacuum tube technology has been listed as follow: a. 1946-1957 b. 1958-1964 c. 1985-1999 d. None of these
Last Answer : a. 1946-1957
Description : Why is a vacuum breaker used on shell and tube heat exchangers that are utilizing steam as the heating utility?
Last Answer : Vacuum breakers are often installed on the shell side (steam side) of shell and tube exchangers to allow air to enter the shell in case of vacuum conditions developing inside the shell. For an ... vacuum in the shell could allow condensate to build in the unit and water hammer may result.
Description : Which of the following statements regarding evacuated tube collectors (ETC) are true? i) ETC is used for high temperatures upto 150oC ii) because of use of vacuum between two concentric glass tube, higher amount of heat is ... upon the ambient temperature i & iii b) ii & iii c) i & iv d) i & ii
Last Answer : d) i & ii
Description : Which of the following was used as circuitry for first generation of computers? (1) Vacuum tube (2) Transistors (3) Integrated circuits (4) Microprocessors
Last Answer : Vacuum tube
Description : what is vacuum tube?
Last Answer : A vacuum tube is a tube with no air particles.
Description : The interaction between an external field and the binding force of an atom causes electrons to do what?
Last Answer : Wobble at a natural resonant frequency.
Description : What element controls the number of electrons striking the screen?
Last Answer : Control grid.
Description : What is the name of the area in a PN junction that has a shortage of electrons and holes?
Last Answer : Depletion region
Description : In reference to the schematic symbol for a diode, do electrons flow toward or away from the arrow?
Last Answer : Toward the arrow.
Description : What is the name given to a piece of pure semiconductor material that has an equal number of electrons and holes?
Last Answer : Intrinsic.
Description : What is the term used to describe the sharing of valence electrons between two or more atoms?
Last Answer : Covalent bonding.
Description : What causes dc bias energy to be absorbed by avalanche electrons and given up to the microwave field applied to an avalanche transit-time diode?
Last Answer : The negative-resistance property.
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.
Description : What are the electrons called that give up energy to the ac field in a magnetron?
Last Answer : Working electrons.
Description : A magnetron will produce oscillations when the electrons follow what type of path?
Last Answer : Circular.
Description : What is the term used to identify the amount of field strength required to cause the electrons to just miss the plate and return to the filament in a circular orbit?
Last Answer : The critical value of field strength
Description : If the constant-speed electrons in a reflex klystron remain in the repeller field for 1 3/4 cycles, what is the mode of operation?
Last Answer : Mode 2.