Photodiode

Definition: A special type of PN junction device that generates current when exposed to light is known as Photodiode. It is also known as photodetector or photosensor. It operates in reverse biased mode and converts light energy into electrical energy. The figure below shows the symbolic representation of a photodiode: Principle of Photodiode It works…

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Difference Between Transducer & Inverse Transducer

One of the major difference between the transducer and the inverse transducer is that the transducer changes the non-electrical quantity into an electrical quantity while the inverse transducer changes the electrical quantity into the non-electrical quantity. The other differences between the transducer and inverse transducer are shown below in the comparison chart. The control action…

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Difference Between AC & DC Bridge

One of the significant difference between the AC and DC bridge is that the AC bridge is used for measuring the unknown impedance of the circuit whereas the DC bridge is used for measuring the unknown resistance of the circuit. The other differences between the AC and DC bridge are shown below in the comparison…

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Electrostatic Instrument

Definition: The instrument whose working depends on the principle of attraction or repulsion of electrodes that carry electrical charges such type of instrument is known as the electrostatic instrument. In other words, the instrument which uses the static electric field for producing the deflecting torque is known as the electrostatic instrument. The electrostatic instrument is…

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Synchroscope

Definition: The synchroscope is a device which shows the correct instant at which the two systems are synchronised. The terms ‘synchronize’ means the machines of equal frequency and voltage are operating parallel to each other. The synchroscope consists the two-phase wound stator and rotor. The alternators provide the two-phase supply to the synchroscope. If any…

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Temperature Transducer

Definition: The temperature transducer converts the thermal energy into a physical quantity likes the displacement, pressure and electrical signal etc. It is an electrical device used for automatic measuring of temperature. The main principle of the temperature transducer is to measure the heat and transfer the information after converting it into the readable form. The…

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Difference Between Moving Iron & Moving Coil Instrument

One of the significant difference between the moving iron and moving coil instrument is that in moving iron instrument, the soft iron system is used for measuring mechanism. Whereas in moving coil instrument the conductor coil is used for DC measurement. The other differences between the moving iron and moving coil instrument are shown below…

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Frequency

Definition: The frequency is the number of oscillation per unit time. It is used for defining the cyclic process like rotation, oscillation, wave etc. The completion of the cyclic process at particular interval of time is known as the frequency. The SI unit of the frequency is Hertz. The symbol λ represents it. The one…

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Difference Between AC & DC Voltage

The major difference between the AC and DC voltage is that in AC voltage the polarity of the wave changes with the time whereas the polarity of the DC voltage always remains same. The other differences between the AC and DC voltage are shown below in the comparison chart. Content: AC Voltage Vs DC Voltage Comparison…

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Rectifier Ammeter

The meter is generally used for measuring the particular quantity. The unit of current is ampere, and the meter which measures the current is known as the ammeter. The rectifier ammeter uses the moving coil along with the rectifier for measuring the current. The main use of the rectifier is to convert the alternating current into…

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