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Q1. State Ohm's Law. How can it be verified experimentally? Does it hold good under all conditions?

Q2. Describe an experiment(with diagram) to study the factors on which the resistance of conducting wire depends.
Pleeeeez help with above questions! Need them very urgently, for exam preparation!!! Pleeeez help!!


Q 1 answ:Ohm's law show the relationship between potential difference and current, where as it states that potential difference is directly propotional to current
mathematical expression for ohm's law is 
     V α I
     i.e., V=IR
 q2 answ:factors affecting resistence 
  - length [Rαl]
  - area of cross section [Rα1/A]
  - nature of material 
  - temparature [RαT]
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