*Resistance, according to Engineering dictionary by John Bird, is the ratio of the potential of an electric current applied to a given conductor to the current intensity value. Resistors can therefore be said to be the opposition to the flow of electric current.*

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*In other words, it is a device or material that offers resistance to the free flow of electrons in an electric circuit. I am now going to relate it to ohms law to make it more understandable.*

*Ohms law states,*

**V = IR**
Ohm is the unit of Resistance. It's reciprocal is Conductance.

Let's run through some examples to make you see its theoretical application.

Exa

**mple****1**
Find the resistance of a coil which draws current of 50mA from a 120V supply

Usin

V= IR

Making R subj

R = V/I

R

*g formula*,V= IR

Making R subj

*ect of*the formulaR = V/I

R

*= 120/50*10^-3**R = 2.4k**ohms*
Examp

Find the resistance of a material with conductance of 0.02 ohm-1

*le 2*Find the resistance of a material with conductance of 0.02 ohm-1

Remember condu

G=1/R

Now make R subject of formu

Cross multiply

**the reciprocal of resistance***ctance is*G=1/R

Now make R subject of formu

**. I am g***la**oing***you two meth***to show***of doing this***ods**:***1.****Cross multiplication:****G =1/R**Cross multiply

**GR = 1****Divide both sides by G****R=1/G****2. Inversion method**

**G=1/R**

**Invert both sides**

**1/G = R**

**Therefore,**

**R = 1/G**

**R = 1/0.02**

**R = 50 ohms**

**That's all for the post of today. In my next post, I wil**

*l show*

*you***the different ty**

*pes***of resis**

*tors there***is and give credits to sites where photos were gotten from. I am al**

*so*

*going***to t**

*each***you all about colour coding.**

**Hop**

*e***you enjoyed thi**

*s*

*post***, have a n**

*ice*

*day*

*.*
socialicons (25)· 14 days agoYou know about engineering?? You really are very good sir

victorlovesecret (31)· 14 days agoThanks so much dear