Properties of Solids & Fluids · JEE Main previous year questions

2004 3 questions

1. Q912004 · 24 Apr 2004 · Shift 1

   Spherical balls of radius $R$ are falling in a viscous fluid of viscosity $\eta$ with a velocity $v$. The retarding viscous force acting on the spherical ball is

   1. A.inversely proportional to both radius $R$ and velocity $v$
   2. B.directly proportional to both radius $R$ and velocity $v$
   3. C.directly proportional to $R$ but inversely proportional to $v$
   4. D.inversely proportional to $R$, but directly proportional to velocity $v$
   Show answer

   Answer: B

2. Q922004 · 24 Apr 2004 · Shift 1

   If two soap bubbles of different radii are connected by a tube

   1. A.air flows from the smaller bubble to the bigger
   2. B.air flows from bigger bubble to the smaller bubble till the sizes are interchanged
   3. C.air flows from the bigger bubble to the smaller bubble till the sizes become equal
   4. D.there is no flow of air.
   Show answer

   Answer: A

3. Q962004 · 24 Apr 2004 · Shift 1

   Two thermally insulated vessels $1$ and $2$ are filled with air at temperatures $(T_1,T_2)$, volume $(V_1,V_2)$ and pressure $(P_1,P_2)$ respectively. If the valve joining the two vessels is opened, the temperature inside the vessel at equilibrium will be

   1. A.$T_1{T}_2(P_1{V}_1+P_2{V}_2)/(P_1{V}_1{T}_2+P_2{V}_2{T}_1)$
   2. B.$(T_1+T_2)/2$
   3. C.$T_1+T_2$
   4. D.$T_1{T}_2(P_1{V}_1+P_2{V}_2)/(P_1{V}_1{T}_1+P_2{V}_2{T}_2)$
   Show answer

   Answer: A