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What is a Carey Foster Bridge : Construction & Its Working

January 1, 2021 By WatElectronics

Carey Foster Bridge

Carey Foster bridge is basically used to calculate the difference between the resistance of two elements. It was invented by scientist Carey Foster in the year 1872. It is one of the variant forms of a wheat stone bridge which is used to measure unknown resistance by balancing two legs of a bridge circuit, in which one leg consists of the unknown component. It can be seen that the wheat stone bridge works on the balancing concept. The same concept is used in Carey Foster bridge with small … [Read more...]

What is Megger : Construction, Working and Its Applications

April 21, 2020 By WatElectronics

Megger

It is quite easy to measure the resistance of a resistor. However, measuring the resistance of an insulator can be a difficult task. This is because the resistance of insulators is extremely high. For that, a device called megger is used which can be used to measure the relatively high value of resistance of insulators. The resistance is measured by comparing the unknown resistance of the insulator to that of the known value of resistance of a material. The circuit comprises two voltage coils … [Read more...]

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