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A $20 \mathrm{cm}$ long capillary tube is dipped vertically in water and the liquid rises upto $10 \mathrm{cm} .$ If the entire system is kept is a freely falling platform, the length of the water column in the tube will be
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The correct answer is:
$20 \mathrm{cm}$
The height raised by liquid in capillary tube
$$
h=\frac{2 I \cos \theta}{\rho g h}
$$
As in freely falling platform, a body experience weightlessness.
So, the liquid will rise upto to length of the capillary.
i.e. height raised by the liquid will be $20 \mathrm{cm}$.
$$
h=\frac{2 I \cos \theta}{\rho g h}
$$
As in freely falling platform, a body experience weightlessness.
So, the liquid will rise upto to length of the capillary.
i.e. height raised by the liquid will be $20 \mathrm{cm}$.
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