When length of tube is less than the height of capillary rise,
the liquid molecules on reaching top of the capillary come into contact with horizontal surface of the tube
. The surface tension becomes horizontal. … Thus an equilibrium is established, and the liquid does not spill over.
What happens if capillary tube is of insufficient height?
The water will never overflow . if the tube is of insufficient length ,
the radius of curvature of the liquid meniscus goes on increasing
, making it more and more float till water is in equilibrium.
When height of a tube is less than liquid rises in the capillarity the liquid does not overflow reason product of radius of the liquid meniscus and height of liquid in capillarity tube is always constant?
Product of radius of meniscus and height of liquid in capillary tube
always remains constant
.
What is the relation between the height of liquid column in the capillary tube and radius of the capillary tube?
When a capillary tube is plunged into a volume of wetting liquid, the liquid rises inside the tube under the effect of capillary forces (Figures 2.49 and 2.50). It is observed that the height reached by
the liquid is inversely proportional to the radius of the tube
. Figure 2.49.
When height of a tube is less than?
Assertion :When height of a tube is less than liquid rise int eh capillary tube,
the liquid does not overflow
. <br> Reason : Product of radius of meniscus and height of liquid in the capilliary tube always remains constant. If both assertion and reason are true and reason is the correct explanation of assertion.
What will happen if the length of the capillary tube?
When length of tube is less than the height of capillary rise,
the liquid molecules on reaching top of the capillary come into contact with horizontal surface of the tube
. The surface tension becomes horizontal. … Thus an equilibrium is established, and the liquid does not spill over.
What will happen if liquid is made to rise in a capillary of insufficient length?
When a capillary tube of insufficient length is dipped in a liquid,
the radius of curvature of the meniscus increase so that hr = constant
. That is pressure on concave side becomes equal to pressure exerted by liquid column so liquid does not overflow.
When liquid rises in capillary tube What is the angle of contact?
The term capillary is not limited to virection. Where S is the surface tension, $rho $ is the density of the liquid and $theta $ is the angle of contact. If $theta < {90^ circ } Rightarrow cos theta > 0 Rightarrow h > 0 Rightarrow $ The liquid will rise when contact angle is
acute
.
When height of tube is less than liquid rise in the capillary tube the liquid does not overflow?
Explanation : Hence when the tube is of insufficient length, radius of curvature of the liquid meniscus
increases
, so as to maintain the product hR a finite constant, i.e., as ft decreases, R increases and the liquid meniscus becomes more and more flat, but the liquid does not overflow.
When a cylindrical tube is dipped vertically into a liquid the angle of contact is 140 when the tube is dipped with an inclination of 40 the angle of contact is?
So, the angle of contact when the tube is inclined is the same as that of the vertical dipping, i.e., [{
140
^ circ }].
What is the formula of capillary rise?
The rise of a column of liquid within a narrow capillary tube is also because of the surface tension. The formula for capillary rise
(h) = 2T/rρg.
What is the relation between capillary rise and radius of capillary tube?
Liquid in a capillary tube (Figure 2C. 1) with radius r
rises until the forces acting on the liquid in the tube are balanced at height l.
Why does water rise in capillary tube?
Capillarity is the result of surface, or interfacial, forces. The rise of water in a thin tube inserted in water is caused by
forces of attraction between the molecules of water and the glass walls and among the molecules of water themselves
. … The narrower the bore of the capillary tube, the higher the water rises.
What will happen for rise of the level if length of the lube is smaller than H?
If the height of the tube is h which is less than the maximum capillary rise H,
the surface of the meniscus is no more concave and surface becomes horizontal and θ. becomes 90 degree and cos 90 = 0
and hence there will be no more pulling force upward .
When a capillary is dipped in water water rises to a height h’if the length of the capillary is made less than H then?
If the length of capillary tube above the surface of water is made less than h then.
water does not rise at all
. water rises up to the tip of capillary tube and then starts overflowing like a fountain. water rises up to the top of capillary tube and stays there without overflowing.
What is phenomenon of capillarity?
Capillary rise or capillarity is a
phenomenon in which liquid spontaneously rises or falls in a narrow space such as a thin tube or in the voids of a porous material
. Surface tension is an important factor in the phenomenon of capillarity. … It can be either concave or convex, depending on the liquid and the surface.
