The dimensional formula for the modulus of rigidity is 

(1) ML2T2

(2) ML1T3

(3) ML2T2

(4) ML1T2

Concept Videos :-

#1 | Basic Concepts & Examples
#2 | Dimensional Analysis : Remaining

Concept Questions :-

(4) Modulus of rigidity = Shear stressShear strain=[ML1T2]

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