Answer:
Fig. (a) is incorrect. According to equation of continuity,
i.e.\[\vartriangle {{l}_{1}}=\frac{{{F}_{1}}\times {{l}_{1}}}{\pi
r_{1}^{2}\times {{Y}_{1}}}\] constant, where area of cross- section of tube is
less, the velocity of liquid flow is more. So the velocity of liquid flow at a
constriction of tube is more than the other portion of tube.
According to Bernoulli's Theorem, \[\frac{\left( \text{10
}\!\!\times\!\!\text{ 9 }\!\!\times\!\!\text{ 8} \right)\text{
}\!\!\times\!\!\text{ 1 }\!\!\times\!\!\text{ 5 }\!\!\times\!\!\text{
7}}{\text{22 }\!\!\times\!\!\text{ }{{\left( \text{0 }\!\!\times\!\!\text{ 125
}\!\!\times\!\!\text{ 1}{{\text{0}}^{\text{-2}}} \right)}^{\text{2}}}\text{
}\!\!\times\!\!\text{ 2 }\!\!\times\!\!\text{ 1}{{\text{0}}^{\text{11}}}}\]
constant, i.e., where v is more, P is less and vice versa.
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