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what is ohms law and its verification and proof too!?

Kindly refer to the links given below to get your answer : 
https://www.meritnation.com/ask-answer/question/ohm-s-law-both-by-a-mathematical-formula-and-by-a-grap/electricity/5126006 


https://www.meritnation.com/ask-answer/question/please-give-me-the-proof-for-ohms-lawive-read-the-study-mt/electricity/7363475


https://www.meritnation.com/ask-answer/question/state-ohm-s-law-draw-curcuit-diagram-for-experimental-repre/electricity/2590157

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This law states that at constant temperature the current in the conductor is directly proportional to the potential difference across the end of its conductor.

let "I" be the current flowing through the resistor and "V" be the potential difference across the ends of the resistor.

According to ohm's law 

I proportional to V

so V proportional to I

so V=RI

So V=IR

where R is a constant of proportionality and is known as resistance of the conductor

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thanx...

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Ohm's law states that the current through a conductor between two points is directly proportional to the potential difference across the two points. Introducing the constant of proportionality, the resistance, one arrives at the usual mathematical equation that describes this relationship:
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