The dimensional formula of effective torsional constant of spring is _______ .

Options

A. `M^1 L^2 T^(-3)`
B. `M^1 L^2 T^(-2) A^(-2)`
C. `M^1 L^2 T^(-2)`
D. `M^0 L^0 T^0`

Answer

C

Explanation

`tau = C theta `
`C= tau//theta`
`C-=[M L^(2) T^(-2)]`