explain Ohms law??

Asked by pr_prashant | 24th Jul, 2010, 07:13: PM

Expert Answer:

Imagine a set of experiments, with different batteries, differents wires of different diameter, length and metals.
 
Now by connecting a battery say 12V across a particular wire, we measure the current. We do this for different wires and batteries and record into a table the V's and I's. 
 
Now Ohm's law says that if we do this at constant temperature, the ratio V/I is constant for the particular combination, i.e. the electric current is directly propotional to the voltage or potential different. And the constant is called the resistance of the wire.
 
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Answered by  | 26th Jul, 2010, 07:08: AM

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