Free Expert Guides on Power Systems, Circuit Design & Electrical Troubleshooting

Measuring pen definition123An electrical tool used to test electrical wiring for electrical power.Measuring pen working principleWhen measuring the live wire, there is a voltage U=220V between the live wire and the ground, and the resistance inside the measuring pen is usually about several megaohms. The current through the measuring pen (that is, the current through the human body) is very small, usually less than 1 mA. When such a small current passes through the human body, it will not hurt p

The role of common electrical toolsElectricians in the installation and maintenance of various power supply and distribution lines, electrical equipment and lines, are inseparable from a variety of electrical tools, such as screwdrivers, wire cutters, wire strippers and so on. There are many kinds of commonly used electrical tools and many uses, and the following is a brief introduction.Sort with electrical toolsTester pen: A common tool used to measure whether a tool is energized.Multimeter: Us

What is Reciprocity Theorem?Reciprocity Theorem DefinitionThe reciprocity theorem states that in a reciprocal circuit, the current remains the same when the positions of the voltage source and ammeter are swapped.Reciprocal CircuitA circuit that follows the reciprocity theorem, where voltage and current are interchangeable, is called a reciprocal circuit.Ideal ComponentsFor the reciprocity theorem to work, both the voltage source and ammeter must have zero internal resistance.Transfer Resistance

What is Superposition Theorem?Superposition Theorem DefinitionThe superposition theorem is defined as a method to find the total current in a branch by summing the currents from each source acting alone.Voltage SourcesReplace voltage sources with short circuits or their internal resistance when removing them from the circuit.Current SourcesReplace current sources with open circuits or their internal resistance when removing them from the circuit.Linear Circuit RequirementThe theorem applies only

What is Substitution Theorem?Substitution Theorem DefinitionThe substitution theorem is defined as the process of replacing an element in a circuit with an equivalent voltage or current source without changing the initial conditions.Statement of Substitution TheoremIf an element is replaced by a voltage source with the same voltage or a current source with the same current, the rest of the circuit remains unchanged.Insight into Circuit BehaviorThis theorem helps understand how circuits behave wh

What is Vector Algebra?Vector Algebra DefinitionVector algebra is the branch of mathematics dealing with vectors, quantities that have both magnitude and direction.Vector DiagramsVector diagrams are visual tools that show the magnitude and direction of vectors, aiding in understanding their relationships.Vector ComponentsA vector can be split into two perpendicular components, typically along the x and y axes.Complex RepresentationVectors can be represented using complex numbers, where the imagi

Electric Screwdriver DefinitionPower tools for tightening and loosening screws, power tools equipped with regulating and limiting torque mechanism, mainly used in assembly lines, is one of the necessary tools for most production enterprises.Working principleAs a mechanical component, the electric screwdriver cannot work without the batch power supply. The batch power supply provides energy and related control functions for the electric screwdriver. Drive the motor rotation. Because the parameter

Tape definitionA tool for measuring lengthTape classification Fibre measuring tape Tape measure Luban ruler

Pliers definitionA hand tool used to grip, fix, or twist, bend, or cut wire.Pliers sorting Wire cutters Needle nose pliers Wire stripper Pipe wrench Side-cutting pliers

Definition of a multimeterThe utility model relates to a magneto-electric instrument with a rectifier that can measure various electrical parameters such as AC, DC current, voltage and resistance.Components of a multimeter Header:The head of a multimeter is a sensitive galvanometer. The dial on the watch head is printed with a variety of symbols, scales and values. Selector switch:The selection switch of the multimeter is a multi-gear rotary switch. Used to select measurement items and ranges St