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What is Dimensional Formula of Efficiency ?

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Efficiency can be  defined as the  ratio of useful output energy to the amount of input energy.


Efficiency = Useful output energy / Input energy.

Dimensional formula of output energy = M1L2T-2
Dimensional formula of input energy = M1L2T-2

Putting these values in above equation we get,

Dimensional formula of Efficiency = M0L0T0.
Efficiency has no SI Unit. (As both values are of energy).

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