Question

Two capillaries of same length and radii in the ratio 1 : 2 are connected in series. A liquid flows through them in streamlined condition. If the pressure across the two extreme ends of the combination is 1 m of water, the pressure difference across the first capillary is

• A. (a) 9.4 m
• A. (b) 4.9 m
• A. (c) 0.49 m
• A. (d) 0.94 m

Answer 1

(d) Here and

As

Or

$\therefore \mathrm { P } _ { 1 } = 16 \mathrm { P } _ { 2 }$

Since, both tubes are connected in series, hence pressure difference across the combination is

Or