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What is Resistor, symbol, types, unit

 

What is Resistor, symbol, types, unit

Welcome to the Electron Tips blog. Our topic today will be about the most important electronic parts used in the field of electronics, as there is no board or electronic device that does not contain it, and this electronic compound is electrical resistance, so what is electrical resistance?  How does electrical resistance work within electrical circuits?  What is the symbol for electrical resistance?  How to measure the value of carbon resistance using an ohmmeter?,  what is resistor used for? 

Definition of electrical resistance:

 Electrical resistance is an electronic piece that is often made of carbon material, and the role of electrical resistance is resistance to electric current, so it was called resistance, and there are many and varied types of electrical resistors that differ according to their role in electronic circuits.

Resistor structure 

Resistance symbol:

Resistor symbol and unit 

 electrical resistance unit:

 Electrical resistance is measured in the Ohm unit, according to the physicist George Ohm, and it is symbolized in electronic circuits by the symbol R.

Working principle of electrical resistance:

 Electrical resistance belongs to the family of passive electronic components, and it impedes the passage of electric current, which is dissipated in the form of heat. If you touch the electrical resistance in an active electrical circuit, you will notice that its temperature is high. 

Electrical resistors are used to protect electronic components and components from combustion and damage when exposed to a high electric current, this is simply how electrical resistance works.

Relation of electrical resistance to Ohm's law:

 Every electrical wire that conducts electricity has an impedance or resistance, and this resistance gives us a loss of electricity. This resistance is considered one of the physical quantities on which the most famous law in electricity is built, which is Ohm’s law, and this is its relationship. We have previously provided a comprehensive explanation about the principle.  Ohm's law work you can go to by clicking here :

 U=R×I

 where :

 U: electric potential and its unit is volt

 R: electrical resistance and its units are ohms

 I: electric current and its unit is ampere

Some types of electrical resistors:

 There are many electrical resistors. Soon we will create a topic on the types of electrical resistors with their explanation.

 Ordinary carbon electrical resistance.

 LDR photoresist.

 varistor.

 Variable electrical resistors.

 Fixed electrical resistors.

How to know the value of electrical resistance:

 To find out the value of electrical resistance, there are two basic methods:

 Measuring electrical resistance with an ohmmeter:

 This is the best way to know the value of the electrical resistance, as we place the indicator of the digital ohmmeter on the electrical resistance symbol, after that we connect the negative and positive probes of the avometer with both ends of the resistance. You will notice the resistance value on the ohmmeter screen.

Measure resistor value 

 Reading the colors of electrical resistors:

 We have previously provided a comprehensive explanation of how to read the values ​​of electrical resistors in code resistor color, and you can read the topic from here.

important note :

 Electrical resistance does not have a positive or negative end. You can measure it or install it in any way you want, unlike some other electronic components.

Conclusion :

 In conclusion, this was a detailed topic about the electrical resistance compound and its working principle within electronic electrical circuits. We also saw ways to know its values and some common types of electrical resistors.

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