The `eta` is rigidity modulus, `r` is the radius , `l` is the length  and `C` is the moment
Channel: Doubtnut
Date: 2020-08-23

The `eta` is rigidity modulus, `r` is the radius , `l` is the length  and `C` is the moment fo the couple then `(2lc)/(pi eta r^(4))` has the dimensions of...........