Give the full form of LASER.

Last Answer : i) Lasers are used for engraving and embossing of printing plates For example- number plate, name plate etc., ii) Lasers are used in cutting, drilling and welding metals. iii) Lasers are used in ... fiber from one computer to other viii) Lasers are used to find flaws or defect in material.

How To Make Laser Experiments

Description : How To Make Laser Experiments

Last Answer : The Red Spot Visible Laser Diodes (VLDs) and Helium Neon (HeNe) lasers both produce a brilliant red spot at great distances. You can do some very annoying things using this property, ... are generated. They appear as warped netting, fine structured traceries of clouds or alien atmospheric phenomena.

How to Get Laser Eye Surgery

Description : How to Get Laser Eye Surgery

Last Answer : How to Get Laser Eye Surgery For people with very poor eyesight, laser eye surgery is one of the many ways to restore a person's clear, vivid, and perfect vision. Millions of people have ... of just about anything, without having to worry about putting your glasses on or wearing your contact lenses.

How to Use a Laser Level

Description : How to Use a Laser Level

Last Answer : How to Use a Laser Level Compared to the ordinary level, a laser level is more efficient and easier to use. It projects a laser beam forward, making sure the measurements for the project you ... quicker and more efficiently. Just remember these steps and tips when you're working with this tool.

Which MFP to choose for the home, laser or inkjet?

Description : Which MFP to choose for the home, laser or inkjet?

Last Answer : Which MFP to choose for the home, laser or inkjet? The popularity of multifunctional devices (MFPs) among home users is growing every day, and this is no coincidence. Due to ... devices are characterized by high printing speed, economy and productivity. These indicators are their strength.

Explain the operating principle of LASER and list applications of LASER diode.

Description : Explain the operating principle of LASER and list applications of LASER diode.

Last Answer : A basic construction of Laser diode is as shown . A PN junction is formed by two layers of doped gallium arsenide. There is highly reflective surface at one end of PN junction and ... 6. laser scanning and light beam illumination. 7. Military applications 8. Medical surgery 9.Diamond cutting

What is the use of laser diode?

Description : What is the use of laser diode?

Last Answer : laser diodes are use in telecommunication, rangefinders, barcode readers etc.

Give the operation of single phase full wave bridge controlled converter with RL load with a neat diagram. Also draw its waveform.

Description : Give the operation of single phase full wave bridge controlled converter with RL load with a neat diagram. Also draw its waveform.

Last Answer : Single phase fully control bridge converter with RL load: 1. During positive half cycle of input voltage, T1 and T2 are forward biased and during negative half cycle, T3 and T4 are forward biased. Therefore, T1-T2 ... cycle till the firing of next pair of SCRs as shown in the waveform.

Evaluate the following quantities and express your results in polar form

Description : Evaluate the following quantities and express your results in polar form

Last Answer : Evaluate the following quantities and express your results in polar form

Evaluate the following complex numbers and leave your results in polar form

Description : Evaluate the following complex numbers and leave your results in polar form

Last Answer : Evaluate the following complex numbers and leave your results in polar form

Calculate these complex numbers and express your results in rectangular form

Description : Calculate these complex numbers and express your results in rectangular form

Last Answer : Calculate these complex numbers and express your results in rectangular form

Express the following functions in cosine form

Description : Express the following functions in cosine form

Last Answer : Express the following functions in cosine form

Define form factor and peak factor.

Description : Define form factor and peak factor.

Last Answer : Form factor is equal to rms value divided by average value ... Peak factor is equal to Max value divided by rms value.

Which of the following waveforms has the lowest form factor?

Description : Which of the following waveforms has the lowest form factor? A) Sine wave B) Square wave C) Sawtooth wave D) Triangle wave

Last Answer : Which of the following waveforms has the lowest form factor? A) Sine wave B) Square wave C) Sawtooth wave D) Triangle wave

Form factor for a sine wave is?

Description : Form factor for a sine wave is?

Last Answer : 1.11

The form factor is the ratio of?

Last Answer : The form factor is the ratio of r.m.s. value to average value.

How to Full Court Press

Description : How to Full Court Press

Last Answer : How to Full Court Press In the game of basketball, most coaches preach the importance of defense. One particularly effective defensive strategy employed by bench tacticians is the full court ... , stamina and good teamwork. Master this defensive scheme and score easy transition basket yourselves.

Draw single phase full wave mid-point converter for inductive load. Draw input and output waveforms for it.

Description : Draw single phase full wave mid-point converter for inductive load. Draw input and output waveforms for it.

Last Answer : Circuit Diagram: Waveforms:

State advantages of short pitch winding over full pitch winding in alternators.

Description : State advantages of short pitch winding over full pitch winding in alternators.

Last Answer : Advantages of Short Pitch Winding over Full Pitch Winding in Alternators: 1) Short pitching reduces the amount of copper needed for end connection when compared with full pitched coil. 2) They ... reduced, thereby increasing the efficiency. 4) The power quality of generated emf is improved.

Draw full bridge & half bridge configuration with common cathode.

Description : Draw full bridge & half bridge configuration with common cathode.

Last Answer : Half Bridge Configuration: Full Bridge Configuration:

Explain full wave bridged rectifier with the help of circuit diagram and input output waveform.

Description : Explain full wave bridged rectifier with the help of circuit diagram and input output waveform.

Last Answer : 1. In positive half cycle (0 to Π): The end A of the secondary winding becomes positive and end B negative. This makes diode D1 and D4 forward biased while diode D2 and D3 are reverse biased. These two diodes will ... D2 and D3 when it is conducting is as follows. B - D2 - RL - D3 - A

A 40 kVA transformer has a core loss of 400 W and a full load copper loss of 800 W. The

Description : A 40 kVA transformer has a core loss of 400 W and a full load copper loss of 800 W. The proportion of full load at maximum efficiency is

Last Answer : A 40 kVA transformer has a core loss of 400 W and a full load copper loss of 800 W. The proportion of full load at maximum efficiency is 0.707

A four -quadrant operation requires two full converters connected in

Description : A four -quadrant operation requires two full converters connected in (1) Series (3) Back to back (2) Parallel (4) Series Cascade

Last Answer : A four-quadrant operation requires two full converters connected in Parallel

A transformer operates 24 hours day at full -load. It's full -load efficiency is :

Description : A transformer operates 24 hours day at full -load. It's full -load efficiency is : (A) equal all day efficiency (B) more than all -day efficiency (C) less than all -day efficiency (D) equal to maximum efficiency

Last Answer : A transformer operates 24 hours day at full -load. It's full -load efficiency is : equal all day efficiency

The ratio of maximum displacement deviation to full scale deviation of the instrument is called?

Description : The ratio of maximum displacement deviation to full scale deviation of the instrument is called?

Last Answer : The ratio of maximum displacement deviation to full scale deviation of the instrument is called linearity.

In a level compounded D.C. generator, full load terminal voltage is?

Last Answer : In a level compounded D.C. generator, full load terminal voltage is equal to no-load terminal voltage.

In over compounded generator, full load terminal voltage is?

Last Answer : In over compounded generator, full load terminal voltage is more than no load terminal voltage.

If a D.C. shunt motor is working at full load and if shunt field circuit suddenly opens?

Last Answer : If a D.C. shunt motor is working at full load and if shunt field circuit suddenly opens this will make armature to take heavy current, possibly burning it.

For the same H.P. rating and full load speed, following motor has poor starting torque?

Last Answer : For the same H.P. rating and full load speed, following motor has poor starting torque differentially compounded.

Why the power factor of semiconverter is better than full converter?

Description : Why the power factor of semiconverter is better than full converter?

Last Answer : Power factor of semiconverter is better than full converter

Explain three phase full wave controller.

Description : Explain three phase full wave controller.

Last Answer : Three phase full wave controller: Three phase full wave controller is also called as the three-phase bidirectional controller. Let the load is star connected so at each phase there are antiparallel connected SCRs. ... conduct at the same time and the third phase will be open.

Explain full bridge converter.

Description : Explain the operation of full bridge converters with their different operating modes. State its advantages and disadvantages.

Last Answer : Full bridge converter: Full bridge converter provides isolation between input and output. Full bridge converter is used for step up or step down the input voltage. Full bridge converter consists of four power semiconductor ... Require filter on both input and output.

single phase full converter

Description : single phase full converter

Last Answer : single phase full converter

Explain construction and working of Coolidge tube for production of X-ray.

Description : Explain construction and working of Coolidge tube for production of X-ray.

Last Answer : Construction:- It consist of hard glass bulb with cathode and anode as shown in fig. Cathode is a metal filament kept at negative potential to the filament. Target T consist of copper ... the filament current, the thermionic emission of electron hence intensity of X- rays can be controlled.

Explain the construction and working of a photocell. State its any two applications.

Description : Explain the construction and working of a photocell. State its any two applications.

Last Answer : Construction: 1. It consists of evacuated glass bulb having cathode (K) and anode (A). 2. The semi cylindrical cathode coated with photosensitive material from inner side. 3. The anode is platinum rod. 4. The ... in Burglar alarm. 4) It is used in TV set. 5) It is used in fire alarms.

Distinguish between Seebeck and Peltier effect .

Description : Distinguish between Seebeck and Peltier effect .

Last Answer : Seebeck's effect Peltier effect When two dissimilar metals are joined together so that two junctions are formed and if one junction is heated and other is cooled then electric current flows ... difference. Amount of heat generated depends on pair of metals and current through it.

Explain process of transmission ultrasonic testing and pulse echo UT testing.

Description : Explain process of transmission ultrasonic testing and pulse echo UT testing.

Last Answer : Transmission UT method:- In this method two different tranducers are used, one acting as a transmitter and other acting as a receiver. The transmitter convers electrical pulse into sound signal. This sound ... fed to the input of CRT is called initial pulse as shown in following diagram.

factors on which NDT method can be selected.

Description : factors on which NDT method can be selected.

Last Answer : i) Codes or standard requirement ii) Specification of material to be tested, for example, nature of material, its size and shape iii) Type of disorders to be detected, also depend on nature ... is also depending on the equipments available for testing vi) Total cost required to test the material.

Explain production of ultrasonic wave by using piezoelectric method.

Description : Explain production of ultrasonic wave by using piezoelectric method.

Last Answer : Principle: When the electric field is applied across the crystal its dimensions changes and when alternating PD is applied across crystal then the crystal sets into elastic vibrations Working ... of crystal. Then the crystal sets into resonance vibration and ultrasonic waves are produced.

applications of X-rays

Description : applications of X-rays

Last Answer : 1. X- rays are used to detect the cracks in the body of aero plane or motor car. 2. X- rays are used to detect the manufacturing defects in rubber tyres or tennis ball in quality control. 3. ... cure diseases like cancer. 11. X - Rays are used to detect bullets position inside the body.

Define Work function and Stopping potential.

Description : Define Work function and Stopping potential.

Last Answer : Work Function: It is the minimum energy required just to emit or detach or knock the electron from the metal surface. Stopping potential: It is the negative potential of photoelectric cell at which photoelectric current becomes zero.

State Joules law of heating.

Description : State Joules law of heating.

Last Answer : Joules law : It state that the amount of heat generated (H) due to the flow of electric current through a resistance is directly proportional to 1) Square of the current ( I2 ) 2) Resistance ( R ) 3) Time for which current flows ( t )

Explain variation of thermo e.m.f. with temperature.

Description : Explain variation of thermo e.m.f. with temperature.

Last Answer : For a given thermocouple , the temperature of one junction is placed at 00C and temperature of other junction is increased by providing heat. The emf generated is measured with the help ... increases and reaches to maximum value and thereafter emf decreases, becomes zero and reverses its sign.

State properties of ultrasonic waves.

Description : State properties of ultrasonic waves.

Last Answer : i) Frequency of these sound waves is more than 20kHz ii) Shorter wavelength iii) They carry high amount of sound energy iv) The speed of propagation of ultrasonic waves increases with increase in ... . x) Posses certain vibrations which are used as good massage action in case of muscular pain.

Define centripetal force and centrifugal force

Description : Define centripetal force and centrifugal force

Last Answer : Centripetal force - It is defined as the force acting along the radius towards the center of the circular path, which keeps the particle in uniform circular motion. OR Centripetal force ... experiences force which is along the radius and away from the center is called Centrifugal force.

anonymous · Answer 1 · 2020-05-24T04:16:27+0000

Full form :

Light Amplification by Stimulated Emission of Radiation.

Give the full form of LASER.

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