Electrical measuring instruments

Electrostatic Voltmeter Working Principle

Electrostatic voltmeters are based on the fact that an electric force (attraction or repulsion) exists between charged plates or objects. An electrostatic voltmeter is essentially an air condenser ; one plate is fixed while the other, which is coupled to the pointer, is free to rotate on jewelled bearings. Electrostatic Voltmeter Working Principle When p.d. …

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Thermocouple Instrument Working Principle

Hi friends, In this article, I am going to discuss the thermocouple instrument working principle, its types and applications. So let us start with our topic. When two metals of different work functions are placed together, a voltage is generated at the junction. This generated voltage is proportional to the temperature and this junction is known as …

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Moving Coil Galvanometer Working Principle

Hi friends, In this article, I am discussing the moving coil galvanometer working principle, its construction and conversion into voltmeter and ammeter. So let us start our topic. A moving coil galvanometer is an easy and sensitive instrument to detect and measure electric current. Moving Coil Galvanometer Working Principle The moving coil galvanometer working principle is based …

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Mechanical Resonance Type Frequency Meter

A mechanical resonance type frequency meter indicate the supply frequency of the circuit directly and is very much convenient for most practical purposes. It is a very simple instrument and has got an advantage of giving reading free from errors due to change in temperature, waveform and magnitude of applied voltage. Construction of Mechanical Resonance Type …

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