We have P =I^2R and P=V^2/R. It seems that P varies with R in two different ways. Is it a contradiction? Explain
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No its not like that...Note that many times we encounter such Relations...
Here It depends on Which quantites you are going to compare...
Suppose we are going to Compare between Power P and Current I...Then remember that whatever quantity present in the relation of P and I will be considered as Constant..Then we make Comparision easily...
So In the relation of P and I are compared and Resistance R being constant here...
Simillarly if we compare the quantity Power P and Potential Difference V then again firstly we must have a relation betwenn them...which is P = V^2/R
Again here R is keeping Constant when P and V being compared....So there is no contradiction as u think here....It actually depends on Comparision etween the quantites...Hope you get..
Here It depends on Which quantites you are going to compare...
Suppose we are going to Compare between Power P and Current I...Then remember that whatever quantity present in the relation of P and I will be considered as Constant..Then we make Comparision easily...
So In the relation of P and I are compared and Resistance R being constant here...
Simillarly if we compare the quantity Power P and Potential Difference V then again firstly we must have a relation betwenn them...which is P = V^2/R
Again here R is keeping Constant when P and V being compared....So there is no contradiction as u think here....It actually depends on Comparision etween the quantites...Hope you get..
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