H=v2/R=I2R. Here if in one way if R increases H also increases. But in another way if R increases H decreases. Which one we have to take, please explain.

Asked by  | 2nd May, 2011, 04:47: AM

Expert Answer:

From Ohm's law (V=IR),the above equation can be written as
 
So both theequation are right and they should be used according to the value given,
for example,if the question ask you to find out H,if I andR were given then you will used  
OR If the question ask you to findH,if V andR were given,then you willused 

Answered by  | 2nd May, 2011, 01:57: AM

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