Correct option: (B) M1 L–1T–2
Explanation:
Modulus of rigidity = η = [(shearing stress) / (shearing strain)]
= {(F/A) / (x/L)}
Considering dimensions, x/L is dimensionless
∴ Dimensional formula for η = [(Force) / (Area)]
= {[M1L1T–2] / [L2]} ------------- F = m × a
i.e. F = m × (* / t2)
= [M1L–1T–2]
