WBJEE · Physics · Mechanical Properties of Fluids
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
- A \(5 \mathrm{cm}\)
- B \(10 \mathrm{cm}\)
- C \(15 \mathrm{cm}\)
- D \(20 \mathrm{cm}\)
Answer & Solution
Correct Answer
(D) \(20 \mathrm{cm}\)
Step-by-step Solution
Detailed explanation
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 \(20 \mathrm{cm}\).
See the Complete Solution
Get step-by-step explanations for this and 2.5 Lakh+ more JEE, NEET & CET questions.
- Unlock all solutions
- Practice the full chapter
- Track accuracy across PYQs
4.8 rated on Google Play · 14,000+ reviews
More questions from Physics
- As shown in figure below, a charge \(+2 \mathrm{C}\) is situated at the origin \(O\) and another charge \(+5 \mathrm{C}\) is on the \(x\) -axis at the point \(A .\) The later charge from the point \(A\) is then brought to a point \(B\) on the \(y\) -axis. The work done is \(\left(\right.\) given \(\left.\frac{1}{4 \pi \varepsilon_{0}}=9 \times 10^{9} \mathrm{m} / \mathrm{F}\right)\)
WBJEE 2013 Easy -
As shown in the figure, a single conducting wire is bent to form a loop in the form of a circle of radius 'r' concentrically inside a square of side ' \(a\) ', where \(a: r=8: \pi\). A battery B drives a current through the wire. If the battery B and the gap G are of negligible sizes, determine the strength of magnetic field at the common centre \(O\).WBJEE 2020 Medium - If \(n\) denotes a positive integer, \(h\) the Planck constant, \(q\) the charge and \(B\) the magnetic field, then the quantity \(\left[\frac{n h}{2 \pi q B}\right]\) has theWBJEE 2014 Easy
-
Three blocks are pushed with a force \(\mathrm{F}\) across a frictionless table as shown in figure. Let \(\mathrm{N}_{1}\) be the contact force between the left two blocks and \(\mathrm{N}_{2}\) be the contact force between the right two blocks. ThenWBJEE 2021 Easy - \(300 \mathrm{gm}\) of water at \(25^{\circ} \mathrm{C}\) is added to \(100 \mathrm{gm}\) of ice at \(0^{\circ} \mathrm{C}\). The final temperature of the mixture isWBJEE 2021 Medium
- In Young's double slit experiment, the fringe width is \(\beta\). If the entire arrangement is placed in a liquid of refractive index \(n\), the fringe width becomes :WBJEE 2010 Easy
More PYQs from WBJEE
- If \(A^2-A+I=0\), then the inverse of the matrix \(A\) isWBJEE 2009 Easy
- The number of solutions of \(2 \sin x+\cos x=3\) isWBJEE 2011 Easy
- If \(\alpha\) and \(\beta\) are roots of \(a x^{2}+b x+c=0,\) then
the equation whose roots are \(\alpha^{2}\) and \(\beta^{2},\) isWBJEE 2016 Easy - \(\mathrm{SiO}_{2}\) is attacked by which one / ones of the following?WBJEE 2020 Medium
- An electron revolves around the nucleus in a circular path with angular momentum \(\overrightarrow{\mathrm{L}} . \mathrm{A}\) uniform magnetic field \(\overrightarrow{\mathrm{B}}\) is applied perpendicular to the plane of its orbit. If the electron experiences a torque \(\overrightarrow{\mathrm{T}}\), thenWBJEE 2022 Medium
- In a \(\triangle A B C, a, b, c\) are the sides of the triangle opposite to the angles \(A, B, C,\) respectively. Then, the value of \(a^{3} \sin (B-C)\) \(+b^{3} \sin (C-A)+c^{3} \sin (A-B)\) is equal toWBJEE 2014 Hard