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Question
If/;fn 
A = Cross–sectional area
E =  Young's modulus of elasticity
G =  Modulus of rigidity
I =  Moment of inertia
J =  Polar moment of inertia
Then torsional rigidity is given by 
rks cyk?kw.kZ n`<rk nh tk;sxhA
A.
AE
B.
GE
C.
EI
D.
GJ
Answer ( Option D)

GJ

Solution

Axial rigidity denoted by AE
Flexural rigidity denoted by EI
Torsional rigidity denoted by GJ

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