What CRT element provides for controls of the number of electrons passing father into the tube?

What CRT element provides for controls of the number of electrons passing father into
the tube?
by

1 Answer

Answer :

control grid
by

Related questions

An element of a CRT, that releases electrons when heated indirectly by a filament

Description : An element of a CRT, that releases electrons when heated indirectly by a filament

Last Answer : cathode

A material that glows when struck by the energetic electrons in a CRT

Description : A material that glows when struck by the energetic electrons in a CRT

Last Answer : phosphor

Which of the following is not a basic part of a CRT?

Description : Which of the following is not a basic part of a CRT?

Last Answer : sawtooth generator

Type of waveform generated by the sweep generator of the CRT

Description : Type of waveform generated by the sweep generator of the CRT

Last Answer : sawtooth

A sensing element that provides a dc voltage less than 10mV with typical power range of 0.1 to 100mW

Description : A sensing element that provides a dc voltage less than 10mV with typical power range of 0.1 to 100mW

Last Answer : thermal converters

What sensor provides a change of resistance with typical power range of 1uW to 10mW and with maximum frequency greater than 100GHz

Description : What sensor provides a change of resistance with typical power range of 1uW to 10mW and with maximum frequency greater than 100GHz

Last Answer : thermistor sensor

An oscilloscope provides easy measurement of __ values.

Description : An oscilloscope provides easy measurement of __ values.

Last Answer : peak to peak

High sensitive DC voltmeter provides accurate reading when measuring ___ circuits.

Description : High sensitive DC voltmeter provides accurate reading when measuring ___ circuits.

Last Answer : high resistance

High sensitive DC voltmeter provides accurate reading when measuring ___ circuits.

Description : High sensitive DC voltmeter provides accurate reading when measuring ___ circuits.

Last Answer : high resistance

What sensor provides a dc voltage approximately 1V at 10mW?

Description : What sensor provides a dc voltage approximately 1V at 10mW?

Last Answer : diode sensor

The ___ provides the visual display showing the form of the signal applied as a waveform on the front screen of a cathode ray oscilloscope

Description : The ___ provides the visual display showing the form of the signal applied as a waveform on the front screen of a cathode ray oscilloscope

Last Answer : CRT

What provides a visual representation of any waveform applied to the input terminals?

Description : What provides a visual representation of any waveform applied to the input terminals?

Last Answer : cathode ray oscilloscope (CRO)

The electron beam in a CRT is made to sweep from left to right across the screen. What tube element causes this sweeping motion?

Description : The electron beam in a CRT is made to sweep from left to right across the screen. What tube element causes this sweeping motion?

Last Answer : The horizontal-deflection plate.

What type of sensing element would you use to measure very low temperature ?

Description : What type of sensing element would you use to measure very low temperature ?

Last Answer : The sensing element used for measuring very low temperature is R. T. D. ( Resistance Temperature Detector )

An element in electronics which serves as a protection against overload?

Description : An element in electronics which serves as a protection against overload?

Last Answer : fuse

What element controls the number of electrons striking the screen?

Description : What element controls the number of electrons striking the screen?

Last Answer : Control grid.

Which of the following statement(s) is/are correct? (1) Persistence is the term used to describe the duration of phosphorescence. (2) The control electrode is used to turn the electron beam on and off. (3) The electron gun creates a source of electrons which are focussed into a narrow beam directed at the face of CRT. (4) All of the above.

Description : Which of the following statement(s) is/are correct? (1) Persistence is the term used to describe the duration of phosphorescence. (2) The control electrode is used to turn the electron beam on and off. (3) ... which are focussed into a narrow beam directed at the face of CRT. (4) All of the above. 

Last Answer : All of the above.

In measurements, the sum of a set of number divided by the total number of pieces of data in the given set is called ______

Description : In measurements, the sum of a set of number divided by the total number of pieces of data in the given set is called ______

Last Answer : arithmetic mean

How does a "CRT storage tube" work?

Description : How does a "CRT storage tube" work?

Last Answer : Part of the answer is based upon the secondary emission of electrons from the phosphor screen itself from a related link. Regular CRTs drain the electron beam current off quickly so after ... their neighbors back and forth within localized area where the pattern was drawn by the electrons.

CRT stands for: a) Ctrl, Refresh, Tab b) Cathode Ray Tube c) Catholic Ray Tuber d) None of These

Description : CRT stands for: a) Ctrl, Refresh, Tab b) Cathode Ray Tube c) Catholic Ray Tuber d) None of These

Last Answer : b) Cathode Ray Tube

CRT stands for: a) Compact Ray Tube b) Cathode Ray Tube c) Compatible Recognition Tool d) None of These

Description : CRT stands for: a) Compact Ray Tube b) Cathode Ray Tube c) Compatible Recognition Tool d) None of These

Last Answer : b) Cathode Ray Tube

CRT stands for: a. Cathode ray tube b. Compared ray tube c. Command ray tube d. None of these

Description : CRT stands for: a. Cathode ray tube b. Compared ray tube c. Command ray tube d. None of these

Last Answer : a. Cathode ray tube

What is a filter used for ?

Description : What is a filter used for ?

Last Answer : The half wave and full wave signals are pulsating D . C . voltages. The use of such voltages is limited to charging batteries, running D. C. motors, and a few other applications. What we really ... voltage from a battery. To get a constant voltage from this, we can use a capacitor input filter. 

What is Zener Diode ? What is a voltage Regulator ?

Description : What is Zener Diode ? What is a voltage Regulator ?

Last Answer : The breakdown region of a p n diode can be made very sharp and almost vertical Diodes with almost vertical breakdown region are known as Zever Diodes. A Zener diodes operating in the breakdown ... VOLTAGE REGULATOR : The output remains constant despite changes in input voltage due to Zever effect.  

What is transistor ? What are the different types ?

Description : What is transistor ? What are the different types ?

Last Answer : A transistor is a three lagged semi conductor device. Basically a transistor means (transfer - resister). Whether the transistor is pnp or npn it resembles two diodes (back to back). The one of the left ... transistor : Emitter - Base - Forward Bias. Collector - Base - Reverse Bias. 

What is CB, CE and CC configuration ?

Description : What is CB, CE and CC configuration ?

Last Answer : Buffer : A device or a circuit used to isolate two pt'ne circuits or stages. The emitter follows is a example of buffer. Alpha = IC / IE Beta = IC / IB

How will you test a transistor with a multimeter. ?

Description : How will you test a transistor with a multimeter. ?

Last Answer : 1. Emitter +ve of meter and Base -ve output = Low resistance 2. Emitter -ve of meter and base +ve output = High resistance. 3. Collector +ve and Base -ve output = Low. 4. Collector -ve and base +ve output = High. Emitter : Collector = High Resistance. PNP : Opposite Results. 

What is a thyristor ? What are its uses ?

Description : What is a thyristor ? What are its uses ?

Last Answer : A thyristor is a special kind of semi conductor device that uses internal feedback to produce latching action. Use : Used for controlling large amounts of load power in motors, heaters, lighting systems etc ... the latches like a open switch. This latch will always stay in open or close position.  

What does a transmitter output start from 3-15 psi or (0.2 - 1 Kg/Cm2) or 4 - 20 ma. etc. ?

Description : What does a transmitter output start from 3-15 psi or (0.2 - 1 Kg/Cm2) or 4 - 20 ma. etc. ? 

Last Answer : The transmitter output stance from what is known as "live zero". This system has specific advantages : 1. The systems automatically alarms when the signal system becomes inoperative. ... transmitter operating, but transmitting a zero measurement and a failure, in the signal system. 

What are Intrinsically safe system ?

Description : What are Intrinsically safe system ?

Last Answer : Intrinsic safety is a technique for designing electrical equipment for safe use in locations made hazardous by the presence of flammable gas or vapors in air. "Defn. :" Intrinsically safe circuit is ... , unfortunately, been adopted in all countries. However two sets of codes in common use are.  

What is feed back control ? What is feed forward control ? Discuss its application ?

Description : What is feed back control ? What is feed forward control ? Discuss its application ?

Last Answer : Feed back control: Feed back control involves the detection of the controlled variable and counteracting of charges its it's value relative to set point, by adjustment of a manipulated ... controller for a particular process application, two factors time and gain must be considered.    

What is Furnace Draft control ?

Description : What is Furnace Draft control ? 

Last Answer : Balanced draft boilers are generally used negative furnace pressure. When both forced draft and induced draft are used together, at some point in the system the pressure will be the same as that of atmosphere. ... have is a very slight (about 0.1" H20 ) negative pressure of the top of furnace.  

What is the difference the a wheatstone bridge and a potentiometer ?

Description : What is the difference the a wheatstone bridge and a potentiometer ?

Last Answer : The difference between a potentiometer and a wheatstone bridge measuring instrument is that potentiometer is a voltage measuring instrument and wheatstone bridge is a current measuring instrument. 

What is the specialty of thermocouples lead wires ?

Description : What is the specialty of thermocouples lead wires ?

Last Answer : They should be of the same material as the thermocouple.  

What are skin temperature thermocouples ?

Description : What are skin temperature thermocouples ? 

Last Answer : Skin thermocouples are those which are directly connected to the process without any thermowell. Used for measuring the skin temperature of heaters furnaces, flue gas etc.  

How will you calibrate a temp. recorder using a potentiometer ?

Description : How will you calibrate a temp. recorder using a potentiometer ?

Last Answer : Connect the potentiometer output to the input of temp. recorder. 1. Connect the ( +ve ) to the ( +ve ) and ( -ve ) to the ( -ve ). 2. If ambient compensation is provided ... ambient temp. millvolts to the corr. input millvolts measured. Find out from the chart for the corresponding temperature. 

Why are Thermowells used ?

Description : Why are Thermowells used ?

Last Answer : In numerous application it is neither desirable nor practical to expose a temperature sensor directly to a process material. Wells are therefore used to protect against damage corrosion, erosion, abrasion and high pressure processes. A ... 3. Monel. 4. Alloy steal. 5. Hastelloy 'C'.

Why is a converter used in a temp. recorder ?

Description : Why is a converter used in a temp. recorder ? 

Last Answer : The converter is designed to convert D. C. input voltage into an A. C. input voltage proportional in amplitude to the input.  

What is burnout feature ? Explain.

Description : What is burnout feature ? Explain.

Last Answer : Burnout provides the warning feature of driving indicator the end of scale if the input circuit should open. A burnout resistor is provided which develops a voltage drop between the measuring circuit and the ... Upscale burnout : R value 10 M Downscale burnout : R value 2.2 M 

What is the constant voltage unit ?

Description : What is the constant voltage unit ?

Last Answer : The constant voltage circuit consists of a rectifier, CR, a filter capacitor C1, followed by two stages of zener regulation. Abridge configuration is provided to 1amp line voltage regulation ... , Thus variations. Resisters R2 and R3 form a bridge that any remoment line voltage effects. 

Draw a potentiometer temp. Measuring circuits and explain its?

Description : Draw a potentiometer temp. Measuring circuits and explain its?  

Last Answer : OPERATION : The input to the instrument is a measurement of some in the processes using a sensing element ( such as thermocouple ) or a device to produce direct voltage, which is the voltage (signal) ... to zero results ( null point ) the balancing ( servo motor is be longer driven )   

What is two wire and three wire R.T.D. system ?

Description : What is two wire and three wire R.T.D. system ?  

Last Answer : Two wire R .T .D. system : Two wire RTD system use for short distance like a compressor field local panel. Three wire System : Three wire system use for long distance coke a field to control Run. The third wire is used for compensation of lead wire resistance. 

What is Pt 100 mean. ?

Description : What is Pt 100 mean. ? 

Last Answer : Pt100 means 100 OHMS at 0'C for a platinum resistance bulb.  

Explain the working of an Enraf level gauge?

Description : Explain the working of an Enraf level gauge?

Last Answer : The Enraf precise level gauge are based on servo powered null-balance technique. A displacer serves as a continuous level sensing element. Principle: A displacer with a relative density higher than ... to a remote indicator of which the receiver motor drives a counter indicating level variation.  

How will you check zero of a level D.P. transmitter while is line ?

Description : How will you check zero of a level D.P. transmitter while is line ? 

Last Answer : ١. Close both the isolation valves. ٢. Open the vent valve on L.P. leg and H.P. leg drain. ٣. Check and adjust zero if necessary. 

How will you commission D.P. transmitter in field in pressurized vessel.

Description : How will you commission D.P. transmitter in field in pressurized vessel.

Last Answer : ١. Close both the isolation valves, Vent the H.P. side. ٢. Fill it with the sealing liquid. ٣. Open the L.P. side vent valve. ٤. Adjust zero with suppression spring. ٥. Close the L.P. side vent valve. ٦. Open both the isolation valves.  

What are the limitations of leveltrol ?

Description : What are the limitations of leveltrol ?

Last Answer : The limitations of a level control that it cannot be used for lengths more than 72 inches.  

What is the used of Suppression and elevation ?

Description : What is the used of Suppression and elevation ?  

Last Answer : Suppression and elevation are used on Level applications where (1) transmitters are not mounted on some level (2) Wet leg. i.e. condensable vapors are present.

What will happen if the displacer has a hole in it while in line ?

Description : What will happen if the displacer has a hole in it while in line ?  

Last Answer : The output will be minimum.