What is Electrical Resistance?

Master Electrician
07/10/2024


What is Electrical  Resistance?


Resistance definition


The 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 temperature


The basic formula of resistance


  • The relationship between resistance, voltage and current (Ohm's Law)

  • The relationship between resistance, power and voltage

  • The relationship between resistance, power and current


公式图.png


Resistance calculation formula


  • Series resistor :

电阻串联.jpg

  • Parallel resistance :


电阻并联.png

Master Electrician

We aim to gather electrical knowledge and share it with others.

Battery charging process using AC adapter
Battery charging process using AC adapter
The process of charging the battery using the AC adapter is as followsConnecting devicePlug the AC adapter into the power outlet, making sure the connection is secure and stable. At this point, the AC adapter starts to obtain AC power from the grid.Connect the output of the AC adapter to the device that needs to be charged, usually through a specific charging interface or data cable.Ac adapter operationInput AC conversionThe circuit inside the AC adapter first rectifies the input AC power, conve
Encyclopedia
09/25/2024
The circuit working principle of one-way switch
The circuit working principle of one-way switch
A one-way switch is the most basic type of switch that has only one input (often called the "normally on" or "normally closed" state) and one output. The working principle of the one-way switch is relatively simple, but it has a wide range of applications in various electrical and electronic devices. The following details the circuit working principle of the one-way switch:The basic structure of a one-way switchA one-way switch usually consists of the following parts: Contact: A metal part used
Encyclopedia
09/24/2024
What is electrical knowledge?
What is electrical knowledge?
Electrical knowledge covers a broad set of theoretical and practical skills related to the basic principles of electricity, circuit design, operation and maintenance of power systems, and the working principles of electronic devices. Electrical knowledge is not limited to academic theory, but also includes skills and experience in practical applications. Here is an overview of some of the core areas of electrical knowledge:Basic concept Circuit theory: includes the basic components of the circui
Encyclopedia
09/24/2024
What is the effect of applying alternating current to a DC machine?
What is the effect of applying alternating current to a DC machine?
Applying alternating current to a DC motor can have a variety of adverse effects because DC motors are designed and operate to handle direct current. The following are the possible effects of applying AC to a DC motor:Cannot start and run properly No natural zero crossing: AC has no natural zero crossing to help the motor start, while DC motors rely on constant direct current to establish a magnetic field and start. Inversion phenomenon: The sinusoidal waveform of alternating current changes dir
Encyclopedia
09/24/2024
Inquiry
Download
Experts Electrical is dedicated to serving the personnel in the global power industry.
Join Experts Electrical, not only can you discover power equipment and power knowledge, but also canhnd like - minded friends!