A dimensionally correct eqn need nt actually be correct bt dimensionally incorrect eqn is necessarily wrng. plz explai

Asked by Aarshiya Khandelwal | 26th Jul, 2013, 05:07: PM

Expert Answer:

A dimensionally correct equation might not be correct. 
 
Example -- If we define area of the circle as 2 * radius^2, then it would be dimensionally correct. However, fundamentally the equation is wrong. 
 
On the other hand, the inverse is always true. So, a dimensionally incorrect equation is always wrong as the dimensions on both the sides of equation must match in all circumstances. 
 
So, dimensional correction is a necessary but not sufficient condition for an equation to be correct. 

Answered by  | 27th Jul, 2013, 09:19: AM

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