RESISTANCE (To something..,)

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Resistance to something..,
 
In general, we usually come across the word "The Resistance," which means opposite or against something. In electrical and electronics terminology, the same word is termed "Electrical Resistance," which means against the electric current. Yes, it does oppose the flow of electrons in a conductor. We all know that when a conducting material is subjected to a force called an electromotive force (e.m.f.), the free electrons present in the material come into motion in a particular direction, and that flow causes the electric current to be produced in that particular conductor. While the motion and direction of the electrons depend upon the e.m.f. applied, for example, a material with high resistance opposes the bulk flow of electrons such that the current produced in the conductor will be less. According to Ohm's law, the e.m.f. is directly proportional to the current produced. If the low e.m.f. is applied, it's obvious that less current is produced. And for the same material, if excess e.m.f. is applied, the excess amount of current should be produced, but it is opposed by the resistance of the material, so that the excess current will be exhausted in the form of heat just as comparing with a heavy flow of water leaks out of the small diameter pipe. To explain this in a simple manner, water leaks (heat dissipation) from a small-diameter (high resistance) pipe when a heavy water flow (excess current) is passed from it. Here, the small-diameter pipe is offering high resistance to the smooth water flow.

 

Thanks & Regards 

ElectrINfinite & Team

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