List four applications of LED.

1 Answer

Answer :

Applications of LED 1.As a power supply status indicator in electronics instruments 2.In traffic light Indicators. 3.In data displaying boards. 4.In medical applications and toys 5.In optical fiber communications 6.Remote controls

Related questions

Description : Advantages of LED over CFL.

Last Answer : Advantages of LED over CFL. 1) Efficiency: LED bulbs use close to a third of the amount of power CFL bulbs would use to produce the same amount of light. This makes them ... decorative to heavy duty industrial applications.  6) Maintenance: Smooth light and low maintenance compared to CFL

Description : Why the Led Glow in Dc Supply ? Whenever give the Ac Supply What is Affect in Led ?

Last Answer : LEDs consume DC current to produce light; with AC current the LED will only be lit when current flow is in the proper direction. AC applied to an LED will cause it to blink on and off, and at high frequency the LED will appear to be lit continuously.

Description : Draw symbol of LED and explain it’s working principle.

Last Answer : Construction of LED: The basic structure of LED is shown in fig.(a). The active region exists between the p and n regions. The light emerges from the active side in all the directions when electron hole-pairs ... fig.(c). In this way an LED emits light. This is the principle of operation of LED.

Description : List out the four applications of diesel electric power plant.

Last Answer : Applications of Diesel Power Plant: 1. It can be used as a standby (emergency) power plant to maintain continuity of supply. (Incase failure of main supply like hospital, Telephone exchange Radio stations, ... 10. Diesel plants are widely used for generating power ranging from 100 to 5,000 H.P.

Description : List any four applications of function generator.

Last Answer : Applications of function generator: 1. To test the bandwidth of audio frequency amplifier. 2. Used for troubleshooting of different analog and digital circuits. 3. Acts as source for alignment of receivers 4. For generation of different waves.

Description : How to Build a Led Billboard

Last Answer : How to Build a Led Billboard How to Build a LED Billboard LEDs are basically light emitting diodes. They tend to emit light when an electrical power courses through them. A LED billboard is a ... plazas. China is one of the largest competitors in the global market for producing state of art LEDs.

Description : What are the advantages of LED lamps?

Last Answer : What are the advantages of LED lamps? LED lamps have an advantage over fluorescent lamps in the first place in terms of environmental friendliness. Another reason for using LED lamps is ... advantages. Today, such lamps are used in everyday life, for industrial lighting and street lighting.

Description : Draw symbols of zener diode and LED.

Last Answer : Symbol of zener diode : Symbol of LED

Description : Analyze the effect of supply voltage on performance of LED as regards current, Lumen output, efficacy and life. 

Last Answer : 1) Effect on Current:- In LED current depends upon supply voltage, if voltage get changes then current also change but this change in current will be control by resistors which are connected in series.  2) ...   4) Effect on Life:- If supply voltage is not stable then life of LED get reduced. 

Description :  Compare the salient features of LED and CFL based on: i] Lamp Efficiency ii] Life span 

Last Answer : Parameter LED CFL Lamp Efficiency  High (more than 70 lumen per watt) Comparatively less (50-60 lumen per watt) Life span (in working hours) 10000 3000

Description : Describe working principle of LED with diagram.

Last Answer : Constructional Diagram: * Light Emitting Diode (LED) works only in forward bias condition. When Light Emitting Diode (LED) is forward biased, the free electrons from ... gallium arsenide and gallium phosphide the emitted photons have sufficient energy to produce intense visible light.

Description : Draw the symbol of LED & photodiode. 

Last Answer : Symbol of LED & photodiode

Description : How do you know the voltage of an LED?

Last Answer : After connecting led to a DC source we can measure the voltage of led by connecting a voltmeter across it.  But voltage rating of the led is given by the manufacturers. Or we can ... in the market For more doubts connect with me in linkdin [email protected] 

Description : What is the voltage of a red LED?

Last Answer : A red led requires 2v to light. LEDs requires different amounts of voltage ranging between 1.8 and 3.3 depending on the intensity and color of the Led.

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 : 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

Description : List applications of stepper motor.

Last Answer : Applications of Stepper Motor: 1) Computer controlled systems 2) Numerical control of machine tools 3) Tape drives 4) Floppy disc drives 5) Computer printers 6) X-Y plotters 7) ... ) Extruders 21) Engravers 22) Analytical and Medical instruments 23) Embroidery Machines 24) Packaging Machines

Description : List advantages and applications of PLC.

Last Answer : The advantages of PLC are as follows: 1. Flexible in Nature: One model of PLC can be used for different operations as per requirement. 2. Easy to install and troubleshooting: In hard ... 1.Continuous bottle filling system 2.Batch mixing system 3.stage air conditioning system 4.Traffic control 

Description : List applications of servomotor.

Last Answer : Applications of Servomotor: 1) Computers 2) Robotics and toys 3) CD/DVD players 4) Textile industries 5) Instrument servos 6) Tracking and guidance system 7) Self-balancing recorders 8 ... 9) Process controllers 10) Electromechanical actuators 11) Air-craft control system 12) Programming device

Description : State any four applications of transformer.

Last Answer : The application of Transformer are 1. Transformer is used for stepping up voltage or stepping down voltage. 2. Transformer is used for isolating load from high voltage or high current. 3. Transformer is used as voltage regulator. 4. Transformer used for power transmission and distribution.

Description : State two applications of : (i) PVC paper (ii) Porcelain with type of class based on withstand temperature is insulating material. 

Last Answer :  (i) Application of PVC paper : 1. It is used in slot lining or motor winding insulation purpose 2. For Insulation of Transformer winding (ii) Application of Porcelain : 1. Mainly used for manufacturing ... on withstand temperature : * H' & C' Class of insulation i e. 180° and above 180°C 

Description : Applications of Spectrum Analyser

Last Answer : Applications of Spectrum Analyser are as follows: i) It is used to study the RF spectrum produced in microwave instrument. ii) It is used for testing of RF interference. iii) It is used for measurement ... a parametric amplifier. xi) It is used to measure the modulation index of an AM wave.

Description : What are ‘Linear actuators’ ? State applications.

Last Answer : What are ‘Linear actuators’ ? State applications.

Description :  Enlist applications of ‘ROBOT’

Last Answer : Automobile Industry: Assembly of care engines, Car wheel mounting system  Electronic Industry: Microcircuit assembly and surface mounting.  Nuclear industry and hazardous environments: Fuel handling in nuclear ... Assembly  Machining  Spray coating Die-casting  Coal mining

Description : Write applications of MANET.

Last Answer : Personal area networking  o cell phone, laptop, ear phone, wrist watch  Military environments  o soldiers, tanks, planes  Civilian environments  o car network  meeting rooms o sports ... o boats, small aircraft  Emergency operations  o search-and-rescue  o policing and fire fighting

Description : Give applications of hair hygrometer. 

Last Answer : Hair hygrometers are used to measure relative humidity where high precision is not required. Some of the applications are, ii) I) Process industries. iii) Coating industries. iv) Wooden musical instruments. v) Greenhouses. vi) A.C rooms

Description : Applications of Diesel power station

Last Answer : Applications of Diesel Power Station:  1. It can be used as a standby (emergency) power plant to maintain continuity of supply. (Incase failure of main supply like hospital, Telephone exchange Radio ... 10. Diesel plants are widely used for generating power ranging from 100 to 5,000 H.P. 

Description : State any two applications of diesel power plants.

Last Answer : Applications of Diesel Power Plant: 1. It can be used as a standby (emergency) power plant to maintain continuity of supply. (Incase failure of main supply like hospital, Telephone exchange Radio ... . The diesel units can be used to supply the auxiliaries for starting the large thermal plants.

Description : Draw block diagram of function generator. Write applications of function generator.

Last Answer : Applications of Function Generator: 1. To test the bandwidth of audio frequency amplifier 2. It can produce sine wave, triangle wave, saw tooth wave, even arbitrary waveform. 3. ... for troubleshooting of different analog and digital circuits 7. Acts as source for alignment of receivers.

Description : State any two applications of zener diode.

Last Answer : Applications of Zener Diode: i) As a voltage regulator. ii) As a fixed reference voltage provider in transistor biasing circuits. iii) As peak clippers or limiters in wave shaping circuits.

Description : Compare between BJT and FET on the basis of (i) Biolar/Unipolar (ii) Tharmal Runaway (iii) Noise (iv) Applications

Last Answer : Parameter BJT FET Bipolar/Unipolar It is bipolar device i.e. current in this device is carried by electrons and holes. It is unipolar device i.e. current ... in oscilloscopes, electronic voltmeters and other measuring and testing equipment because of their high input impedance.

Description : State the applications of digital electronics.

Last Answer : 1. The processor, graphics controller are built on principles of digital electronics. 2. In Computers, tablet, displays, LCD/LED TV. 3. mobile/smart phone, , computer ,keyboard, mouse 4. speed/ ... bike/car, various control of the car, 5. ATM machines, credit /debit cards 6. Telephone exchange

Description : State any two applications of electromagnet.

Last Answer : Applications of Electromagnet: Cranes, Motors, Generators, Transformers, Electromagnetic Relays, Circuit breakers, Traction, Measuring instruments, Electrical Bell etc.

Description : State two types of inductors and give their applications.

Last Answer : Types of inductors: i) Air cored inductor ii) Iron cored inductor iii) Ferrite cored inductor Air cored inductor: These are used for high frequency application e.g. Radio sets ... radio receiver, wide band pulse transformers, oscillators, signal generators, high frequency amplifiers, etc. 

Description : Mini Lathe Applications

Last Answer : Don't Go Cutting Lathes more than just come in different shapes and sizes; they come with various features and functions too. Take the case of the woodworking lathe. As its name suggests, ... standard lathe, but mini lathes more than make up for it with their size, convenience and portability.

Description : Electronic Applications

Last Answer : Some companies require applicants to fill out an electronic application. This is not the same as emailing your resume to a human resources manager, or an electronic resume. This is an application ... the recruiter. You may call instead, so long as there are no specifications about not phoning.

Description : How To Make Baking Soda Applications

Last Answer : Bicarbonate of soda or baking soda has many different uses in the household. Although much more expensive products have been developed over the years to do the same jobs, baking soda can work ... melted plastic bread wrapper from toaster. Dampen cloth and make a mild abrasive with baking soda.

Description : applications of bio-diesel

Last Answer : 1. It is an alternative fuel formulated exclusively for diesel engines with little or no modification in engines. 2. It is also used as a heating fuel in domestic & commercial boilers. 3. It is used in rocket fuels.

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.

Description : State applications of conduction and radiation.

Last Answer : Applications of conduction:- 1) Bad conductor of heat is used as insulators. E.g. glass , thermo Cole , sawdust etc. 2) The calorimeters are kept in wooden box. 3) The coils of heavy duty ... . 7. Inactivation of HIV by application of heat radiations. 8. Teapots has bright shining surface.

Description : Give applications 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. 

Description : State two applications of isolation transformer

Last Answer : Applications of isolation transformer: i) Isolates the load equipment from supply ground: ii) Reduction of voltage spikes iii) It acts as a decoupling device. iv) Protects loads from harmonic distortion.

Description : Types of rolling mills and its applications

Last Answer : Types of rolling mills and its applications (1) Two-high rolling mill: used in blooming and slabbing mills (2) Three-high rolling mill: used for making plates or sections. (3) Four- ... : This mill is used for rolling stainless steel and other high strength steel sheets of thin gauge.

Description : State the applications of TIG welding.

Last Answer : The applications of TIG welding are as follows: 1. Mostly used to weld aluminum and aluminum alloys. 2. It is used to weld stainless steel, carbon base alloy, copper base alloy, nickel base alloy etc. 3. It is used to welding dissimilar metals. 4. It is mostly used in aerospace industries.

Description : State the applications of rolling.

Last Answer : Applications of rolling are as follows: 1. Concrete reinforcing bars. 2. Plates. 3. Wire rods. 4. Sheet and strip. 5. Rails. 6. Piping and tubes. 7. Body panels. 8. Construction materials

Description : State the modification to be done in dc series motor to work satisfactorily as ac series motor. State applications of ac series motor.

Last Answer : Modifications are necessary in a dc series motor so that it operates satisfactorily on ac supply. The modifications are as follows:  1) AC series motor is built with a few field turns as ... and grinders 5) High speed vacuum cleaners 6) Sewing machines 7) Food processors 8) Drilling machine 

Description : State suitable single phase motor for following applications: (i) Table fan (ii) Mixers and Grinders

Last Answer : Application Suitable Single Phase Motor Table Fan 1) Capacitor split phase motor 2) Capacitor start capacitor run motor Mixers and Grinders 1) Universal motor 2) A.C. Series motor

Description : State the applications and specification of (i) Resistor (ii) Capacitor (iii)Inductor

Last Answer : Application of resistor: 1.Resistors are used in high frequency instrument. 2.Resistor is used in power control circuit. 3.It is used in DC power supplies. 4.Resistors are used ... DC Current  3.Electromagnetic Interference (EMI)  4.Magnetic Saturation Flux Density  5.Curie Temperature 

Description : Write applications of each of the following:(i) Fuse (ii) MCB (iii) MCCB.

Last Answer : i) Applications of fuse:  * Used in domestic installations to provide short circuit protection.  * Used in commercial / Industrial installations to provide overload and short circuit protection.  * Used in ...  * Rectifiers panels,  * U.P.S, Electronic equipment,  * Motors,  * Furnaces

Description : Write two applications of D.C. series motor. 

Last Answer : The applications of D.C. series motor: 1. Cranes 2. Hoists 3. Trolley and cars 4. Conveyors 5. For traction work i.e. electric locomotives 6. Elevator 7. Air compressor