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CBSE Class 10 Answered

explain Ohms law??
Asked by pr_prashant | 24 Jul, 2010, 07:13: PM
answered-by-expert 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.
 
Regards,
Team,
TopperLearning.
Answered by | 26 Jul, 2010, 07:08: AM

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