Water rises upto a height h in a capillary on the surface of eart… - Vidyadip

MCQ

Water rises upto a height $h$ in a capillary on the surface of earth in stationary condition. Value of $h$ increases if this tube is taken

A
On sun
B
On poles
C
In a lift going upward with acceleration
✓
In a lift going downward with acceleration

✓

Answer

Correct option: D.

In a lift going downward with acceleration

d
(d) If lift moves downward with some acceleration then effective $g$ decreases, so $h$ increases.

As $h = \frac{{2T\cos \theta }}{{rdg}}$

$h \propto \frac{1}{g}$

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