56. 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 first capillary is
(a) 9.4 m (b) 4.9 m
(c) 0.49 m (d) 0.94 m
Answer-d
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(a) – 5 J (b) – 10 J (c) – 15 J (d) – 20 J Answer-a