What is Resistor?

What is Resistor?

What is Resistor?

To know about electrical branch deeply first and foremost need to know about basic knowledge of electrical components which is used widely in electrical.

• One of the basic element of electrical circuit is Resistor.

                      

  √ Resistor

  

Resistor

• Resistor is element which oppose the flow of current.

• Resistance measured in 'ohm' (Ω)

• Resistance is take away from ohm's law as a constant. (V= IR, here R is resistance)

• Resistance depends length of conductor's size, area of conductor and conducting material. 

• Formula of Resistor

                R = ρl/a

       Where, ρ is resistivity

                     l  is length of conductor

                    a. is area of conductor

• Resistance is also depends on temperature. But ohm's law apply when temperature is constant.

• We can decide the value of Resistor by using colour code shown in below image.

Color code of resistor

• Now learn about how to calculate equivalent resistance in series and parallel

 1. Series connection

      R= R1 + R2 + R3 + ..... + Rn

 2. Parallel connection

      1/R = 1/R1 + 1/R2 + 1/R3 +.....+ 1/Rn

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