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Define coefficient of viscosity of a liq...

Define coefficient of viscosity of a liquid.

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The coefficient of viscosity of a liquid is the viscous force acting tangentially per unit area of a liquid layer having a unit velocity gradient in a direction perpendicular through the direction of flow of the liquid.
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Define co-efficient of viscosity.

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Knowledge Check

  • If temperature rises, the coefficient of viscosity of a liquid ……….. .

    A
    decreases
    B
    increase
    C
    remain unchanged
    D
    increases for some liquids and decreases for others

  • If dimensions of critical velocity of a liquid v_c flowing through a tube are expressed as [eta^xrho^yr^z] , where eta , rho and r are the coefficient of viscosity of liquid, density of liquid and radius of the tube respectively, then the values of x , y and z are given by :

    A
    -1,-1,1
    B
    -1,-1,-1
    C
    1, 1, 1
    D
    1,-1,-1

  • An air bubble of diameter 4 mm rises steadily through a solution of density 1500 kgm^(-3) at the rate of 30 cm^(-1) the coefficient of viscosity of the solution is

    A
    `3.3 xx 10^(-3)` poise
    B
    `2.2 xx 10^(-3)` poise
    C
    `3.3 xx 10^(-3)` poise
    D
    `4.4 xx 10^(-3)` poise

    • Similar Questions

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    A metal plate of area 0.10 m^(2) is connected to a 0.01 kg mass via a string that passes over an ideal pulley (considered massless and frictionless), A liquid with a film thickness of 0.3 mm is placed between the plate and the table. When released the plate moves to the right with a constant speed of 0.085 ms^(-1) . Find the coefficient of viscosity of the liquid.

    A metal plate of area 0.10 m^(2) is connected to a 0.01 kg mass via a string that passes over an ideal pulley (considered massless and frictionless), A liquid with a film thickness of 0.3 mm is placed between the plate and the table. When released the plate moves to the right with a constant speed of 0.085 ms^(-1) . Find the coefficient of viscosity of the liquid.

    A liquid flows throug ha pipe of 1.0 mm radius and 10 cm length under a pressure 10^(4) dyne cm^(-2) . Calculate the rate of flow and the speed of the liquid coming out of the tube. The coefficient of viscosity of the liquid is 1.25 centipoise.

    A liquid flows throug ha pipe of 1.0 mm radius and 10 cm length under a pressure 10^(4) dyne cm^(-2) . Calculate the rate of flow and the speed of the liquid coming out of the tube. The coefficient of viscosity of the liquid is 1.25 centipoise.

    When a solid moves through a liquid, the liquid opposes the motion with a force F. The magnitude of F depends on the coefficient of viscosity eta of the liquid, the radius r of the sphere and the speed v of the sphere. Assuming that F is proportional to different powers of these quantities, guess a formula for F using the method of dimension.

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