Resistance Box

Definition: The box which contains the resistors of different values for estimating and comparing the resistance is known as the resistance box. The accuracy of the resistance box is very high. The main application of the resistance box is to control the specific value of current to flow through the circuit. The main advantage of …

Resistance Box Read More »

Digital Instrument

Definition: The instrument which represents the measurand value in the form of the digital number is known as the digital instruments. It works on the principle of quantization. The quantization is the process of converting the continuous input signal into a countable output signal. The construction of the digital instrument is very complex, and their …

Digital Instrument Read More »

Vacuum Tube Voltmeter (VTVM)

Definition: The voltmeter which uses the vacuum tube for amplifying the measurand AC and DC voltage is known as the vacuum tube voltmeter (VTM). The vacuum tube increases the sensitivity of the voltmeter because of which it can detect the signal of very weak strength. The electronic voltmeter is used for measuring the voltage of …

Vacuum Tube Voltmeter (VTVM) Read More »

Electronic Voltmeter

Definition: The voltmeter which uses the amplifier for increases their sensitivity is known as the electronic voltmeter. It is used for measuring the voltages of both the AC and DC devices. The electronic voltmeter gives the accurate reading because of high input resistance. The moving coil voltmeter is not able to detect the low voltages. …

Electronic Voltmeter Read More »

Phantom Loading

Definition: Phantom loading is the phenomena in which the appliances consume electricity even when they turn off. The disc of the energy meter rotates which increases the reading of the meter, but the devices do not consume power. This type of loading is also known as the vampire or virtual loading. The phantom loading mainly …

Phantom Loading Read More »

Magnetoresistor

Definition: The resistance of some of the metal and the semiconductor material varies in the presence of the magnetic field, this effect is called the magnetoresistance. The element which has these effects is known as the magnetoresistor. In other words, the magnetoresistor is a type of resistor whose resistance varies with the magnetic field. The magnetoresistor …

Magnetoresistor Read More »

Resistive Transducer

Definition: The transducer whose resistance varies because of the environmental effects such type of transducer is known as the resistive transducer. The change in resistance is measured by the ac or dc measuring devices. The resistive transducer is used for measuring the physical quantities like temperature, displacement, vibration etc. The measurement of the physical quantity is …

Resistive Transducer Read More »

Synchro

Definition: The Synchro is a type of transducer which transforms the angular position of the shaft into an electric signal. It is used as an error detector and as a rotary position sensor. The error occurs in the system because of the misalignment of the shaft. The transmitter and the control transformer are the two main …

Synchro Read More »

Bolometer

Definition: The bolometer is a device used for detecting and measuring the heat and radiation of  Microwave energy or RF.  It uses the temperature sensitive resistive element who resistance changes with the temperature. The Thermistor and Barretter are the examples of the commonly used resistive element. The circuit of the bolometer is in the form …

Bolometer Read More »