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JEE Advanced2008PhysicsMechanical Properties of FluidsActual

Paragraph: A small spherical monoatomic ideal gas bubble ( = 5 3 ) is trapped inside a liquid of density ₁ (see figure). Assume that the bubble does not exchange any heat with the liquid. The bubble contains n moles of gas. The temperature of the gas when the bubble is at the bottom is T₀ , the height of the liquid is H and the atmospheric pressure is p₀ (Neglect surface tension). Question: As the bubble moves upward

Options

  1. AOnly the force of gravity
  2. BThe force due to gravity and the force due to pressure of the liquid
  3. CThe force due to gravity, the force due to the pressure of the liquid and the force due to viscosity of the li
  4. DThe force due to gravity and the force due to viscosity of the liquid

Correct answer

D. The force due to gravity and the force due to viscosity of the liquid

Step-by-step solution

As the bubble moves upwards, besides the buoyancy force (cause of which is pressure difference) only force of gravity and force of viscosity will act. correct option is (d).

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