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 its previous value. Then, the vertical deflection of the beam on the screen would become

(A) 64 mm (B) 32 mm (C) 8 mm (D) 1 mm

1 Answer

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 anode voltage is reduced to half of its previous value. Then, the vertical deflection of the beam on the screen would become 32 mm

Related questions

Description : vertical deflection system and explain its operation.

Last Answer : The main function of the vertical deflection system , is to provide an amplified signal of proper level to derive the vertical deflection plates without any distortion. For amplification of the ... suppression, reduced nonlinear effects because none of the plates are at ground potential.

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. 

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

Description : The Lissajous pattern on the screen of a CRO is an ellipse with major axis in quadrant 2 and quadrant 4. Then the phase difference between two signals Can be :  (A) 270° (B) 210° (C) 180° (D) 300°

Last Answer : The Lissajous pattern on the screen of a CRO is an ellipse with major axis in quadrant 2 and quadrant 4. Then the phase difference between two signals Can be : 210°

Description : sketch time period measurement by CRO.

Last Answer : Horizontal sweep is turned ON and the display appealing on the screen is adjusted by varying different control knobs provided on the front panel of CRO, till the signal is suitably displayed ... Where m=Number of division in one complete cycle n=Setting of time base =Time/Division

Description : application of CRO.

Last Answer : Applications of CRO: 1) Voltage measurement. 2) Current measurement. 3) Measurement of phase difference. 4) Measurement of phase. 5) Measurement of frequency. 6) Measurement of inductance. ... in various circuits. 17) For checking transistor. 18) It can measure short time interval.

Last Answer : A sensitive galvanometer produces large deflection for a small value of current.

Description : Define : i) Diffuse radiation ii) Beam radiation ii) Insolation iv) Solar constant

Last Answer : i) Diffuse radiation: It is the solar radiation which is scattered by the particles in earth's atmosphere and this radiation does not have any unique direction.  ii) Beam radiation: Solar radiation ... from the sun.  OR  It is the average radiation received outside the earth's atmosphere

Description : Compare analog CRO with digital storage oscilloscope (DSO).

Last Answer : Analog CRO DSO 1 High bandwidth Less bandwidth due to aliasing effect 2 High  writing speed about 15 GHz Limited speed 3 No memory Has memory ... Less storage time. The digital oscilloscope is  capable of an infinite storage time, using its digital memory.

Description : List any four measure knobs on front panel on CRO.

Last Answer : Knobs on front panel of CRO: 1. Power ON- OFF 2. Intensity control 3. Focus control 4. Astigmatism control 5. Volt/Div control 6. Vertical position control 7. Invert 8. Horizontal position control 9. Synchronization. 10. Channel selection.

Description : List any two applications of CRO.

Last Answer : Applications of CRO: 1) Measurement of phase and frequency. 2) Measurement of inductance and capacitance. 3) Tracing the waveform. 4) Determination of amplitude of variable quantity. 5) In ... in transmission lines 9) To check faulty components in various circuit 10) For tracing transistor curves

Description : Draw block diagram of CRO. Write function of each block.

Last Answer : 1. Vertical amplifier strengthens the input signal applied to vertical depleting plates 2. Trigger circuit gives input to time base circuit 3. The output of time base generator is amplified by ... of CRT internally coated with Phosphors material on which we observe waveform of the input signal.

Description : The time base signal in Cathode Ray Oscilloscope (CRO) is  (1) A square wave signal (2) A sawtooth signal (3) A triangular wave signal (4) A sinusoidal signal

Last Answer : 2 Saw tooth 

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. 

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.

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.

Description : What is the charge and mass of an electron?

Last Answer : Charge on electrons is 1.6022*10-19CAnd the mass of electrons is 9.109*10-31 kg

Description : How to Trim Vertical Blinds

Last Answer : How to Trim Vertical Blinds Are the vertical blinds you purchased too long for your windows? Before you think about throwing them out or replacing them, don't, because there's an easy way to ... than those that trail on the floor. Trim yours appropriately, and you'll find it absolutely gratifying.

Description :  vertical and horizontal resolution in brief.

Last Answer : Resolution: The scanning and reproduction of the finest details of the picture is known as resolution of TV system. Vertical Resolution: The ability of the scanning system to resolve picture details in vertical ... (N) that get scanned in one horizontal line are  N = Na * Aspect Ratio *K

Last Answer : Advantages of vertical axis wind mills: 1. Simple blade design 2. Low cost of fabrication. 3. No yaw controller required. 4. Easy maintenance because ground mounted generator and gear box. 

Description : On the ladder resting on the ground and leaning against a smooth vertical wall, the force of friction will be?

Last Answer : On the ladder resting on the ground and leaning against a smooth vertical wall, the force of friction will be zero at its upper end.

Description : On a ladder resting on smooth ground and leaning against vertical wall, the force of friction will be?

Last Answer : On a ladder resting on smooth ground and leaning against vertical wall, the force of friction will be upwards at its upper end.

Description : A heavy ladder resting on floor and against a vertical wall may not be in equilibrium, if?

Last Answer : A heavy ladder resting on floor and against a vertical wall may not be in equilibrium, if the floor and wall both are smooth surfaces.

Description : [SFW] How many inches is yours? And can you grip it with one hand? Question about smartphone screen sizes.

Last Answer : What is “inches”?

Description : How to Remove a Window Screen

Last Answer : How to Remove a Window Screen Window screens are removed either because the winter or rainy season is approaching, or every time these installations need cleaning. While many would think this is easy, messing ... scrub with an old toothbrush. Let it dry under the sun and store away for future use.

Description : How to Mount a Flat Screen TV

Last Answer : How to Mount a Flat Screen TV If you recently purchased a flat screen TV, one of the major concerns you have to take care of is mounting it on the wall. Flat screen TVs look better on the wall ... enjoyable by mounting it on a wall. Just be careful not to drop your precious new TV while mounting it!

Description : How to Silk Screen T-Shirts

Last Answer : How to Silk Screen T-Shirts Making a personalized silk screen shirt is a way of creative expression. You can make any design you want and let everyone see your artsy side. Here are some ... screen shirts is easy to do. Gather your friends together and spend an afternoon making personalized shirts.

Description : How to Clean an LCD Screen

Last Answer : How to Clean an LCD Screen Liquid crystal display screens, more known as LCD screens, is becoming more and more popular for its higher resolutions and space-saving dimensions. However, like all appliances ... touching the screen, regular cleaning of your LCD screen will keep it doing its job well.

Description : How to Clean a Plasma HDTV Screen

Last Answer : How to Clean a Plasma HDTV Screen Plasma screens are becoming common Today, the old box-type TV is being rapidly replaced by high-definition plasma HDTV. These TVs produce crystal-clear pictures and generate good ... once a week to prevent dust from settling on it. (Learn how to get rid of dust)

Description : How to Build a Screen Door

Last Answer : How to Build a Screen Door How to Build a Screen Door After a winter of having the heavy wooden front door closed to the elements, it's nice to leave it open to the refreshing spring ... after stretching width wise and length wise. There will be a certain amount of screen stretching over time.

Description : How to Screen Job Applicants

Last Answer : How to Screen Job Applicants An employee, ideally, should have much knowledge and skill to perform a job correctly. Only a short period should be devoted to training, so he or she can ... collate and review all the evaluations carefully to extract the ones best qualified for the vacant position.

Description : How to Silk Screen ?

Last Answer : How to Silk Screen Ever wish you can make t-shirts of your very own? Silk screening is a great way to start. Not only can you start printing your own t-shirts, but you can start printing on ... the screen. Once you're done printing, make sure that the screen is cleaned thoroughly using Mr. Clean.

Description : How to Print Screen ?

Last Answer : How to Print Screen Print screen is one of the most useful functions on your computer system. There are times that you may need to capture the full image displayed on your screen, or parts of the ... a lot with print screen. With these tips, you can put that often-ignored function to good use.

Description : How to Change Screen Resolution ?

Last Answer : How to Change Screen Resolution The resolution of your computer screen can affect the way you perceive images on your computer, and helps you accomplish tasks better and more efficiently. With high ... make it easier for you to accomplish your tasks, and to maximize your use of hardware.

Description : Is it normal for cracks to disappear once a TV is off?

Last Answer : Before flat TVs, Sony Trinitron TVs had horizontal wires across the screen.

Description : Nvidia geforce display locked above resolution, can't start windows?

Last Answer : answer:Sound strange… It should have started in safemode even if there was a driver error, atlast mine did last week.. Is there any video outputs on the motherboard in addition to the Geforce card ? Maybe use thtat to uninstall and reinstall driver ?

Description : Can you help me with my monitor problem (black with short flashes of the image)?

Last Answer : From what little I know about monitors yours (like my previous one) is about to die. Those flashes definitely warning signs.

Description : How do I unscrew these (laptop) screws I can't get a grip on?

Last Answer : tip of a strong sharp knife, but it may bent the knife. Jewlers screwdriver set at Radio shack or walmart are inexpensive

Description : What does "visual liberty" mean?

Last Answer : That would be pure advertising. Maybe true relative to the iphone, but compared to other products, you know, like laptops and notebooks, that is almost sarcastic. Does not even support Flash. Visual liberty my arse.

Description : For a simply supported beam of span 15 m, the minimum effective depth to satisfy the vertical deflection limits should be (A) 600 mm (B) 750 mm (C) 900 mm (D) More than 1 m

Last Answer : Answer: Option B

Description : Sketch Block diagram of vertical deflection system used in CRO.

Last Answer : Block diagram of vertical deflection system used in CRO

Description : The ___________ of a CRO controls the brightness of the spot formed on the screen a) Filament b) Grid c) Deflection plates d) Cathode

Last Answer : b) Grid

Description : When the vertical input is 0V, the electron beam may be position at the __ of the screen.

Last Answer : vertical center

Description : Y –axis in a CRO normally represents

Last Answer : Volt 

Description : A simply supported beam carries uniformly distributed load of 20 kN/m over the length of 5 m. If flexural rigidity is 30000 kN.m2, what is the maximum deflection in the beam? a. 5.4 mm b. 1.08 mm c. 6.2 mm d. 8.6 mm

Last Answer : a. 5.4 mm

Description : A simply supported beam deflects by 5 mm when it is subjected to a concentrated load of 10 kN at its centre. What will be deflection in a 1/10 model of the beam if the model is subjected to a 1 kN load at its centre? (A) 5 mm (B) 0.5 mm (C) 0.05 mm (D) 0.005 mm

Last Answer : (A) 5 mm

Description : A beam 3m long simply supported at its ends ,is carrying a point load W at the centre.If the slope at the ends of the beam should not exceed 10,find the deflection at the centre of beam? a.18.41 mm b.13.45 mm c.17.45 mm d.21.67 mm.

Last Answer : c.17.45 mm

Description : A beam of uniform rectangular section 200 mm wide and 300mm deep is simply supported at its ends.It carries a uniformly distributed load of 9KN/m run over the entire span of 5m.If E=1×104 N/mm2, what is the maximum deflection? a.14.26 mm b.17.28 mm c.18.53 mm d.16.27 mm.

Last Answer : d.16.27 mm.

Description : What effect do longer deflection plates have on the electron beam?

Last Answer : A greater deflection angle.

Description : What type of deflection is preferred for a crt electron beam?

Last Answer : . Electromagnetic.