A) On the surface of Jupiter, height will be less than h
B) In a lift moving up with constant acceleration height is less than h
C) On the surface of moon the height is more than h
D) In a lift moving down with constant acceleration height is less than h
E) At the poles, height is less than that at equator
Correct Answer: D
Solution :
The height (h) to which water rises in a capillary tube is given by \[h=\frac{2T\cos \theta }{r\rho g}\]where\[\theta \]is angle of contact, r the radius, \[\rho \] the density and g acceleration due to gravity. When lift moves down with constant acceleration, height is less than h, because effective value of acceleration due to gravity increases hence h decreases.
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