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
Instrumentation
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
