The eta is rigidity modulus, r is the ra...

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...........

A

Angle

B

Mass

C

Length

D

Frequency

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The correct Answer is:

A

Using dimensional formula

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