Which of the following ratios is dimensionless?

PHYSICS · Single correct · CBSE · Physics · Units and Measurements · Units and Measurements

Problem

Which of the following ratios is dimensionless? (a)

\frac{v}{g\ell}

(b)

\frac{P\ell}{\rho v}

(c)

\frac{v}{\sqrt{g\ell}}

(d)

\frac{\eta}{\rho v}