Physics Circle home Student Login

Home›Chapters›Surface Tension PYQs›Angle of Contact & Capillarity›Question 40

MHT CET 2024 (4 May, Shift 1) · Angle of Contact & Capillarity

Angle of Contact & Capillarity question from MHT CET 2024 (4 May, Shift 1)

Q40MHT CET 2024 · 4 MAY · SHIFT 1Difficult

Angle of Contact & Capillarity

Water rises up to height ' XX ' in a capillary tube immersed vertically in water. When the whole arrangement is taken to a depth ' d ' in a mine, the water level rises up to height ' YY '. If ' RR ' is the radius of earth then the ratio YX\frac{Y}{X} is

Show answer and solution

Answer: (a)

  1. h=2Tcos⁡θrρg⇒h∝1gh = \dfrac{2T\cos\theta}{r\rho g} \Rightarrow h \propto \dfrac{1}{g}.
  2. In the mine g′=g(1−dR)g' = g\left(1 - \dfrac{d}{R}\right).
  3. YX=gg′=(1−dR)−1\dfrac{Y}{X} = \dfrac{g}{g'} = \left(1 - \dfrac{d}{R}\right)^{-1}.
  4. So the answer is (a) (1−dR)−1\left(1 - \dfrac{d}{R}\right)^{-1}.
Report a mistake

More questions on Angle of Contact & Capillarity