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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 numerically equal to the viscous force acting tangentially between two layers of liquid having unit area of contact and unit velocity gradient normal to the direction of flow of liquid.
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Define co-efficient of viscosity.

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.

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

    Explore conceptually related problems

    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.

    Water is flowing in a pipe of radius 1.5 cm with an average velocity of 15 cm s^(-1) . What is the nature flow ? Given coefficient of viscosity of water is 10^(-3) kg m^(-1)s^(-1) and its density is 10^3 kg m^(-3) .

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