## PMMC Instrument Working Principle | Permanent Magnet Moving Coil Instrument

Figure 1 shows the basic construction of a PMMC instrument. A moving-coil instrument contains principally of a … Read More

## Wire Gauge Sizes | Circular mils

In order to compare the resistance and conductor sizes with each other, we need to establish a convenient … Read More

## Impedance Measurement Theory

The opposition that a circuit offers to the flow of AC is called impedance. By measuring the voltage … Read More

## Ohmmeter Basic Concepts and Working Principle

Ohmmeter Definition An ohmmeter is an instrument used to measure the resistance. It is an instrument containing a … Read More

## Digital Voltmeter Circuit and Working Principle

In digital voltmeters, input quantity is a voltage or is converted into a voltage. Normally, digital voltmeters are … Read More

## Digital Frequency Meter Circuit Diagram and Working Principle

The frequency of periodic electric voltage or current can be determined directly by the use of a frequency … Read More

## Oscilloscope Basics | What is an Oscilloscope

“Oscilloscope is most widely used to display amplitude and period of the signal as well as the shape … Read More

## Potentiometer Variable Resistor Working Principle

A potentiometer or a rheostat is an instrument used to measure and compare potentials without drawing any current from … Read More

## Wheatstone Bridge Circuit Theory and Working Principle

Wheatstone bridge is used to measure unknown resistance and is defined by the circuit of the following figure. In … Read More

## AC Energy Meter Working Principle

Energy is the product of power and time and is measured in watt-seconds or Joule. Since the voltage … Read More

## Power Measurement In a Three-Phase System using Wattmeter

Wattmeter is an instrument, used to measure power in a circuit using current and voltage of the circuit. … Read More

## Voltmeter-Definition and Working Principle

A voltmeter is a basic device used for the measurement of electric potential or voltage, in volts. As … Read More