In case of pump the specific speed is given by:
(a) $$\frac{N\sqrt{Q}}{H^{\frac{1}{2}}}$$
(b) $$\frac{N\sqrt{N}}{H^{\frac{3}{4}}}$$
(c) $$\frac{N\sqrt{P}}{H^{\frac{2}{3}}}$$
(d) $$\frac{N\sqrt{Q}}{H^{\frac{3}{4}}}$$

A

(a)

B

(b)

C

(c)

D

(d)