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

What is Electrical Resistance?Resistance definitionThe obstruction of the conductor to the current is called the resistance of the conductor, and the resistance is also a physical quantity that describes the conductivity of the conductor.Factors that affect resistance Length of material The cross-sectional area of the material Properties of materials Environment temperatureThe basic formula of resistance The relationship between resistance, voltage and current (Ohm's Law) The relationship betwee

The circuit diagram of Pluging in a card for electricity

What is a circuit breaker?Circuit breaker definitionCircuit breaker is a switch device composed of contact system, arc extinguishing system, operating mechanism, release device, housing, etc, which can close, carry and break the current under normal and abnormal conditions to protect the circuit and equipment from overload, short circuit and other faults.Basic structure Contact system Arc extinguishing system Operating mechanism Release device ShellWorking principleWhen the short circuit, the ma

Circuit diagram of three switches controlling a lamp

Simple circuit diagram Of Voice-activated lights

The circuit diagram of hand drillRotor forward turning circuit diagramRotor reversal circuit diagram

Voltage definition Voltage is a physical quantity that measures the energy difference generated by the unit charge in the electrostatic field due to the different potential, voltage is the reason for the directional movement of free charges in the circuit to form the current, the international system of units of voltage is volts (V, referred to as volts).Voltage direction From high potential to low potential.Voltage calculation The charge moves from point A to point B in the electric field, a

The secondary control circuit of three - phase asynchronous motor inching jog forward and reverse

Simple self-locking control motor runs integral wiring

What is electric current?Current definitionIn electromagnetism, the amount of electricity passing through any cross section of the conductor in unit time is called the current intensity, referred to as current, the current symbol is I, the unit is amperes, referred to as "ampere".The cause of current formationA current is formed when the free charge in a conductor moves in a regular direction under the action of an electric field force.Direction of currentThe direction of positive charge directi