Signal Generator

Definition: The signal generator is an electronic device which induces the repeating and non-repeating analogue or digital signals.The signal generator is extensively used in troubleshooting, signal tracing, testing, adjustment of amplifier response and alignment of radio and T.V circuit. The signal generator has inbuilt modulation property. The amplitude and modulation property are very common in…

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Deflection Type Instrument

Definition: The instruments in which the measured quantity produces physical effects which deflect or displace the moving system of the instruments in known as the deflection type instrument. In other words, the instrument in which the deflection provides the basis for measuring the electrical quantity is known as the deflection type instrument. Such type of…

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Liquid Crystal Diode (LCD)

Definition: The LCD is defined as the diode that uses small cells and the ionised gases for the production of images. The LCD works on the modulating property of light. The light modulation is the technique of sending and receiving the signal through the light. The liquid crystal consumes a small amount of energy because…

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Light Emitting Diode (LED)

Definition: The LED is a PN-junction diode which emits light when an electric current passes through it in the forward direction. In the LED, the recombination of charge carrier takes place. The electron from the N-side and the hole from the P-side are combined and gives the energy in the form of heat and light.…

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Difference Between LED & LCD

One of the major difference between the LED and the LCD is that the LED uses the PN-Junction diode which emits light when the current passing through it, whereas LCD uses liquid crystal or plasma for visible light emission. The liquid crystals are filled between the glass electrode and when the power is applied across it,…

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Digital Storage Oscilloscope

Definition: The digital storage oscilloscope is defined as the oscilloscope which stores and analysis the signal digitally, i.e. in the form of 1 or 0 preferably storing them as analogue signals. The digital oscilloscope takes an input signal, store them and then display it on the screen. The digital oscilloscope has advanced features of storage,…

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Difference Between Photodiode & Phototransistor

One of the major difference between the photodiode and the phototransistor is that the photodiode uses PN-junction diode which converts the light energy into an electric current, whereas the phototransistor uses the ordinary transistor (NPN transistor) for the conversion of light into current. Some other differences between the photodiode and phototransistor are shown in the…

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Electrostatic Deflection in CRT

Definition: Electrostatic deflection is the method of aligning the path of charged particles by applying the electric field between the deflecting plates. The word electrostatic means the strength and the direction of the field changes with respect to time. So that, the particles will move only in one direction. The cathode ray tube uses deflecting…

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Difference Between Ammeter & Voltmeter

The major difference between the ammeter and the voltmeter is that the ammeter measures the flow of current, whereas the voltmeter measures the emf or voltage across any two points of the electrical circuit. The other differences between the ammeter and voltmeter are presented below in the comparison chart. Electricity is measured in two ways. i.e.,…

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Electron Gun

Definition: Electron gun is defined as the source of focused and accelerated electron beam. It is a device used in Cathode Ray Tube for displaying the image on the phosphorous screen of CRT. The electron gun emits electrons and forms them into a beam by the help of a heater, cathode, grid, pre-accelerating, accelerating and…

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