A 20 cm long capillary tube is dipped vertically in water and the liquid rises upto 10 cm. If the entire system is kept in a freely falling platform, the length of water column in the tube will be

Question

A 20 cm long capillary tube is dipped vertically in water and the liquid rises upto 10 cm. If the entire system is kept in a freely falling platform, the length of water column in the tube will be (A) 5 cm (B) 10 cm (C) 15 cm (D) 20 cm

Tardigrade Admin · Accepted Answer

The height raised by liquid in capillary tube

h = \frac{2 l c o s θ}{ρ 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 c m

.

Q. A 20cm long capillary tube is dipped vertically in water and the liquid rises upto 10cm. If the entire system is kept in a freely falling platform, the length of water column in the tube will be

5 cm

10 cm

15 cm

20 cm

The height raised by liquid in capillary tube h=ρgh2lcosθ​ 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 20cm.

Q. A $20 c m$ long capillary tube is dipped vertically in water and the liquid rises upto $10 c m$ . If the entire system is kept in a freely falling platform, the length of water column in the tube will be

The height raised by liquid in capillary tube
$h = \frac{2 l c o s θ}{ρ g h}$
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 $20 c m$ .