In this article, I am going to discuss the NTC thermistor working principle, its characteristics, and its applications. So let us start. A thermistor is a special type of resistor whose resistance changes with the change in its body temperature. These are of two types: PTC Thermistor: Positive Temperature Coefficient (PTC) thermistor, is made up […]
Hi friends, in this article, I am going to discuss about the lux meter working principle and its application. We have to measure light in many tasks. For this, the Lux meter should be used. To measure the light accurately, a lux meter is a very suitable device. It is calibrated to read directly in lux. The
The errors in transducers occur because they do not follow, the input-output relationship given by qo = f(qi) The error can be expressed in terms of either input or the output quantity. Four types of errors which occur usually are as under: Errors in Transducers 1. Scale Error The scale error comprises of four different types
There are many ways to measurement of a physical quantity. While the selection of transducers, and how to select a transducer for a particular application, the following points should be kept in the mind. Unfortunately, most transducers are not sensitive to just one quantity. If measurements are to be made under conditions where there is a likelihood of two or
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
Hi friends, In this article, I am providing you some basic information about Brushless DC motor i.e. BLDC motor. With the help of this information you can easily understand the BLDC motor working principle and operation. The torque-speed characteristics and the flexibility of the dc motor have made it a very attractive choice for applications
The most common schemes employed for the protection of a three-phase generator stator windings from earth faults phase-to-phase faults make use of circulating current principle. In these protection schemes, currents at the two ends of the protected section are compared. Under normal conditions, these currents are equal became different on the occurrence of a fault in
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In this system, a delta/star-connected transformer is used. Three wires are taken from the phases and the fourth wire (i.e. neutral wire) is taken from the star point. If the voltage of each phase conductor to neutral is V then line to line voltage between the phases will be √3V. The 3 phase 4 wire
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. Galvanometer Working Principle The working principle of galvanometer is based upon the
The Kirchhoff’s Laws are very useful in solving electrical networks which may not be easily solved by Ohm’s Law. In this article, I will describe these laws and will show some of Kirchhoff’s voltage law examples to make these laws easily understandable. Kirchhoff’s Laws, two in number, are as follows: Kirchhoff’s Current Law: This law