Viscocity
PHXI10:MECHANICAL PROPERTIES OF FLUIDS

361325 A thin plate \({A B}\) of large area \({A}\) is placed symmetrically in a small gap of height ' \({h}\) ' filled with water of viscosity \({\eta_{0}}\) and the plate has a constant velocity \({v}\) by applying a force \({F}\), as shown in the figure. If the gap is filled with some other liquid of viscosity \({0.75 \eta_{0}}\) where should the plate be placed in the gap, so that the plate can again be pulled at the same constant velocity \({V}\), by applying the same force \({F}\). (Take \({h=20 {~cm}}\))
supporting img

1 \(2\,cm\)
2 \(6\,cm\)
3 \(5\,cm\)
4 \(7\,cm\)
PHXI10:MECHANICAL PROPERTIES OF FLUIDS

361326 Viscous force is similar to friction in solids, but viscous force
I. Is independent of area but friction depends on area
II. Is temperature dependent while friction force between solids depends upon normal reaction
III. Is velocity dependent while friction is velocity independent

1 I, II, III are correct
2 I,III are correct
3 II,III are correct
4 I, II are correct
PHXI10:MECHANICAL PROPERTIES OF FLUIDS

361327 The space between two large horizontal metal plates, \(6\,\;cm\) apart, is filled with a liquid of viscosity \(0.8\;N/{m^2}\). A thin plate of surface area \(0.01\;\,{m^2}\) is moved parallel to the length of the plate such that the plate is at a distance of \(2\;m\) from one of the plates and \(4\;cm\) from the other. If the plate moves with a constant speed of \(1\;m{s^{ - 1}}\), then

1 The layers of the fluid, which is in contact with the moving plate, is having the maximum velocity
2 The layer of the fluid, which is having the maximum velocity, is lying mid-way between the plates
3 The layer of the fluid, which is in contact with the two large plates, moving with the maximum velocity.
4 The layer of the fluid, which is in contact with the moving plate and is on the side of nearer plate, is moving with the maximum velocity
PHXI10:MECHANICAL PROPERTIES OF FLUIDS

361328 Statement A :
When non ideal fluids flow, there is no loss of energy due to friction.
Statement B :
Different layers of the fluid do not exert forces on each other.

1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both statements are correct.
4 Both Statements are incorrect.
PHXI10:MECHANICAL PROPERTIES OF FLUIDS

361329 The velocity of the surface layer of water in a river of depth \(20\;m\) is \(5\;m{\rm{/}}s\). The shearing stress between the surface layer and the bottom layer
is \(\left( {\eta = {{10}^{ - 3}}poise} \right)\)

1 \(2.5 \times {10^{ - 5}}\;N{\rm{/}}{m^2}\)
2 \(3 \times {10^{ - 4}}\;N{\rm{/}}{m^2}\)
3 \(3.5 \times {10^{ - 5}}\;N{\rm{/}}{m^2}\)
4 \(4 \times {10^{ - 3}}\;N{\rm{/}}{m^2}\)
PHXI10:MECHANICAL PROPERTIES OF FLUIDS

361325 A thin plate \({A B}\) of large area \({A}\) is placed symmetrically in a small gap of height ' \({h}\) ' filled with water of viscosity \({\eta_{0}}\) and the plate has a constant velocity \({v}\) by applying a force \({F}\), as shown in the figure. If the gap is filled with some other liquid of viscosity \({0.75 \eta_{0}}\) where should the plate be placed in the gap, so that the plate can again be pulled at the same constant velocity \({V}\), by applying the same force \({F}\). (Take \({h=20 {~cm}}\))
supporting img

1 \(2\,cm\)
2 \(6\,cm\)
3 \(5\,cm\)
4 \(7\,cm\)
PHXI10:MECHANICAL PROPERTIES OF FLUIDS

361326 Viscous force is similar to friction in solids, but viscous force
I. Is independent of area but friction depends on area
II. Is temperature dependent while friction force between solids depends upon normal reaction
III. Is velocity dependent while friction is velocity independent

1 I, II, III are correct
2 I,III are correct
3 II,III are correct
4 I, II are correct
PHXI10:MECHANICAL PROPERTIES OF FLUIDS

361327 The space between two large horizontal metal plates, \(6\,\;cm\) apart, is filled with a liquid of viscosity \(0.8\;N/{m^2}\). A thin plate of surface area \(0.01\;\,{m^2}\) is moved parallel to the length of the plate such that the plate is at a distance of \(2\;m\) from one of the plates and \(4\;cm\) from the other. If the plate moves with a constant speed of \(1\;m{s^{ - 1}}\), then

1 The layers of the fluid, which is in contact with the moving plate, is having the maximum velocity
2 The layer of the fluid, which is having the maximum velocity, is lying mid-way between the plates
3 The layer of the fluid, which is in contact with the two large plates, moving with the maximum velocity.
4 The layer of the fluid, which is in contact with the moving plate and is on the side of nearer plate, is moving with the maximum velocity
PHXI10:MECHANICAL PROPERTIES OF FLUIDS

361328 Statement A :
When non ideal fluids flow, there is no loss of energy due to friction.
Statement B :
Different layers of the fluid do not exert forces on each other.

1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both statements are correct.
4 Both Statements are incorrect.
PHXI10:MECHANICAL PROPERTIES OF FLUIDS

361329 The velocity of the surface layer of water in a river of depth \(20\;m\) is \(5\;m{\rm{/}}s\). The shearing stress between the surface layer and the bottom layer
is \(\left( {\eta = {{10}^{ - 3}}poise} \right)\)

1 \(2.5 \times {10^{ - 5}}\;N{\rm{/}}{m^2}\)
2 \(3 \times {10^{ - 4}}\;N{\rm{/}}{m^2}\)
3 \(3.5 \times {10^{ - 5}}\;N{\rm{/}}{m^2}\)
4 \(4 \times {10^{ - 3}}\;N{\rm{/}}{m^2}\)
PHXI10:MECHANICAL PROPERTIES OF FLUIDS

361325 A thin plate \({A B}\) of large area \({A}\) is placed symmetrically in a small gap of height ' \({h}\) ' filled with water of viscosity \({\eta_{0}}\) and the plate has a constant velocity \({v}\) by applying a force \({F}\), as shown in the figure. If the gap is filled with some other liquid of viscosity \({0.75 \eta_{0}}\) where should the plate be placed in the gap, so that the plate can again be pulled at the same constant velocity \({V}\), by applying the same force \({F}\). (Take \({h=20 {~cm}}\))
supporting img

1 \(2\,cm\)
2 \(6\,cm\)
3 \(5\,cm\)
4 \(7\,cm\)
PHXI10:MECHANICAL PROPERTIES OF FLUIDS

361326 Viscous force is similar to friction in solids, but viscous force
I. Is independent of area but friction depends on area
II. Is temperature dependent while friction force between solids depends upon normal reaction
III. Is velocity dependent while friction is velocity independent

1 I, II, III are correct
2 I,III are correct
3 II,III are correct
4 I, II are correct
PHXI10:MECHANICAL PROPERTIES OF FLUIDS

361327 The space between two large horizontal metal plates, \(6\,\;cm\) apart, is filled with a liquid of viscosity \(0.8\;N/{m^2}\). A thin plate of surface area \(0.01\;\,{m^2}\) is moved parallel to the length of the plate such that the plate is at a distance of \(2\;m\) from one of the plates and \(4\;cm\) from the other. If the plate moves with a constant speed of \(1\;m{s^{ - 1}}\), then

1 The layers of the fluid, which is in contact with the moving plate, is having the maximum velocity
2 The layer of the fluid, which is having the maximum velocity, is lying mid-way between the plates
3 The layer of the fluid, which is in contact with the two large plates, moving with the maximum velocity.
4 The layer of the fluid, which is in contact with the moving plate and is on the side of nearer plate, is moving with the maximum velocity
PHXI10:MECHANICAL PROPERTIES OF FLUIDS

361328 Statement A :
When non ideal fluids flow, there is no loss of energy due to friction.
Statement B :
Different layers of the fluid do not exert forces on each other.

1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both statements are correct.
4 Both Statements are incorrect.
PHXI10:MECHANICAL PROPERTIES OF FLUIDS

361329 The velocity of the surface layer of water in a river of depth \(20\;m\) is \(5\;m{\rm{/}}s\). The shearing stress between the surface layer and the bottom layer
is \(\left( {\eta = {{10}^{ - 3}}poise} \right)\)

1 \(2.5 \times {10^{ - 5}}\;N{\rm{/}}{m^2}\)
2 \(3 \times {10^{ - 4}}\;N{\rm{/}}{m^2}\)
3 \(3.5 \times {10^{ - 5}}\;N{\rm{/}}{m^2}\)
4 \(4 \times {10^{ - 3}}\;N{\rm{/}}{m^2}\)
PHXI10:MECHANICAL PROPERTIES OF FLUIDS

361325 A thin plate \({A B}\) of large area \({A}\) is placed symmetrically in a small gap of height ' \({h}\) ' filled with water of viscosity \({\eta_{0}}\) and the plate has a constant velocity \({v}\) by applying a force \({F}\), as shown in the figure. If the gap is filled with some other liquid of viscosity \({0.75 \eta_{0}}\) where should the plate be placed in the gap, so that the plate can again be pulled at the same constant velocity \({V}\), by applying the same force \({F}\). (Take \({h=20 {~cm}}\))
supporting img

1 \(2\,cm\)
2 \(6\,cm\)
3 \(5\,cm\)
4 \(7\,cm\)
PHXI10:MECHANICAL PROPERTIES OF FLUIDS

361326 Viscous force is similar to friction in solids, but viscous force
I. Is independent of area but friction depends on area
II. Is temperature dependent while friction force between solids depends upon normal reaction
III. Is velocity dependent while friction is velocity independent

1 I, II, III are correct
2 I,III are correct
3 II,III are correct
4 I, II are correct
PHXI10:MECHANICAL PROPERTIES OF FLUIDS

361327 The space between two large horizontal metal plates, \(6\,\;cm\) apart, is filled with a liquid of viscosity \(0.8\;N/{m^2}\). A thin plate of surface area \(0.01\;\,{m^2}\) is moved parallel to the length of the plate such that the plate is at a distance of \(2\;m\) from one of the plates and \(4\;cm\) from the other. If the plate moves with a constant speed of \(1\;m{s^{ - 1}}\), then

1 The layers of the fluid, which is in contact with the moving plate, is having the maximum velocity
2 The layer of the fluid, which is having the maximum velocity, is lying mid-way between the plates
3 The layer of the fluid, which is in contact with the two large plates, moving with the maximum velocity.
4 The layer of the fluid, which is in contact with the moving plate and is on the side of nearer plate, is moving with the maximum velocity
PHXI10:MECHANICAL PROPERTIES OF FLUIDS

361328 Statement A :
When non ideal fluids flow, there is no loss of energy due to friction.
Statement B :
Different layers of the fluid do not exert forces on each other.

1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both statements are correct.
4 Both Statements are incorrect.
PHXI10:MECHANICAL PROPERTIES OF FLUIDS

361329 The velocity of the surface layer of water in a river of depth \(20\;m\) is \(5\;m{\rm{/}}s\). The shearing stress between the surface layer and the bottom layer
is \(\left( {\eta = {{10}^{ - 3}}poise} \right)\)

1 \(2.5 \times {10^{ - 5}}\;N{\rm{/}}{m^2}\)
2 \(3 \times {10^{ - 4}}\;N{\rm{/}}{m^2}\)
3 \(3.5 \times {10^{ - 5}}\;N{\rm{/}}{m^2}\)
4 \(4 \times {10^{ - 3}}\;N{\rm{/}}{m^2}\)
PHXI10:MECHANICAL PROPERTIES OF FLUIDS

361325 A thin plate \({A B}\) of large area \({A}\) is placed symmetrically in a small gap of height ' \({h}\) ' filled with water of viscosity \({\eta_{0}}\) and the plate has a constant velocity \({v}\) by applying a force \({F}\), as shown in the figure. If the gap is filled with some other liquid of viscosity \({0.75 \eta_{0}}\) where should the plate be placed in the gap, so that the plate can again be pulled at the same constant velocity \({V}\), by applying the same force \({F}\). (Take \({h=20 {~cm}}\))
supporting img

1 \(2\,cm\)
2 \(6\,cm\)
3 \(5\,cm\)
4 \(7\,cm\)
PHXI10:MECHANICAL PROPERTIES OF FLUIDS

361326 Viscous force is similar to friction in solids, but viscous force
I. Is independent of area but friction depends on area
II. Is temperature dependent while friction force between solids depends upon normal reaction
III. Is velocity dependent while friction is velocity independent

1 I, II, III are correct
2 I,III are correct
3 II,III are correct
4 I, II are correct
PHXI10:MECHANICAL PROPERTIES OF FLUIDS

361327 The space between two large horizontal metal plates, \(6\,\;cm\) apart, is filled with a liquid of viscosity \(0.8\;N/{m^2}\). A thin plate of surface area \(0.01\;\,{m^2}\) is moved parallel to the length of the plate such that the plate is at a distance of \(2\;m\) from one of the plates and \(4\;cm\) from the other. If the plate moves with a constant speed of \(1\;m{s^{ - 1}}\), then

1 The layers of the fluid, which is in contact with the moving plate, is having the maximum velocity
2 The layer of the fluid, which is having the maximum velocity, is lying mid-way between the plates
3 The layer of the fluid, which is in contact with the two large plates, moving with the maximum velocity.
4 The layer of the fluid, which is in contact with the moving plate and is on the side of nearer plate, is moving with the maximum velocity
PHXI10:MECHANICAL PROPERTIES OF FLUIDS

361328 Statement A :
When non ideal fluids flow, there is no loss of energy due to friction.
Statement B :
Different layers of the fluid do not exert forces on each other.

1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both statements are correct.
4 Both Statements are incorrect.
PHXI10:MECHANICAL PROPERTIES OF FLUIDS

361329 The velocity of the surface layer of water in a river of depth \(20\;m\) is \(5\;m{\rm{/}}s\). The shearing stress between the surface layer and the bottom layer
is \(\left( {\eta = {{10}^{ - 3}}poise} \right)\)

1 \(2.5 \times {10^{ - 5}}\;N{\rm{/}}{m^2}\)
2 \(3 \times {10^{ - 4}}\;N{\rm{/}}{m^2}\)
3 \(3.5 \times {10^{ - 5}}\;N{\rm{/}}{m^2}\)
4 \(4 \times {10^{ - 3}}\;N{\rm{/}}{m^2}\)