Surface Tension
PHXI10:MECHANICAL PROPERTIES OF FLUIDS

361314 The figure shows a soap film in which a closed elastic thread is lying. The film inside the thread is pricked. Now the sliding wire is moved out so that the surface area increases. The radius of the circle formed by elastic thread will
supporting img

1 Increase
2 Decrease
3 Remains same
4 Data insufficient
PHXI10:MECHANICAL PROPERTIES OF FLUIDS

361315 What is the radius of the biggest aluminium coin of thickness, \(t\) and density \(\rho\), which will still be able to float on the water surface of surface tension \(S\) ?

1 \(\dfrac{3 S}{4 \rho g t}\)
2 \(\dfrac{4 S}{3 \rho g t}\)
3 \(\dfrac{S}{\rho g t}\)
4 \(\dfrac{2 S}{\rho g t}\)
PHXI10:MECHANICAL PROPERTIES OF FLUIDS

361316 A ring is cut from a platinum tube of \(8.5\;\,cm\) internal and \(8.7\;cm\) external diameter. It is supported horizontally from a balance so that it comes in contact with the water in a glass vessel. What is the surface tension of water if an extra \(3.97\;\,g\) weight is required to pull it away from water ? \(\left( {g = 980\;cm/{s^2}} \right)\)
supporting img

1 42.06 dyne/cm
2 36.02 dyne/cm
3 30.84 dyne/cm
4 47.32 dyne/cm
PHXI10:MECHANICAL PROPERTIES OF FLUIDS

361317 A \(10\;cm\) long wire is placed horizontally on the surface of water and is gently pulled up with a factor of \(2 \times {10^2}\;N\) to know the wire in equilibrium. The surface tension, in \(N{m^{ - 1}}\) of water is

1 0.1
2 0.2
3 0.001
4 0.002
PHXI10:MECHANICAL PROPERTIES OF FLUIDS

361318 A metal wire of density \(\rho\) floats on water surface horizontally. For it not to sink in water maximum possible radius of wire should be \(\frac{{{T^n}}}{{\sqrt {\pi \rho g} }}\) where, \(T\) is surface tension of water. Find \(n\).

1 0.5
2 0.8
3 0.3
4 0.9
PHXI10:MECHANICAL PROPERTIES OF FLUIDS

361314 The figure shows a soap film in which a closed elastic thread is lying. The film inside the thread is pricked. Now the sliding wire is moved out so that the surface area increases. The radius of the circle formed by elastic thread will
supporting img

1 Increase
2 Decrease
3 Remains same
4 Data insufficient
PHXI10:MECHANICAL PROPERTIES OF FLUIDS

361315 What is the radius of the biggest aluminium coin of thickness, \(t\) and density \(\rho\), which will still be able to float on the water surface of surface tension \(S\) ?

1 \(\dfrac{3 S}{4 \rho g t}\)
2 \(\dfrac{4 S}{3 \rho g t}\)
3 \(\dfrac{S}{\rho g t}\)
4 \(\dfrac{2 S}{\rho g t}\)
PHXI10:MECHANICAL PROPERTIES OF FLUIDS

361316 A ring is cut from a platinum tube of \(8.5\;\,cm\) internal and \(8.7\;cm\) external diameter. It is supported horizontally from a balance so that it comes in contact with the water in a glass vessel. What is the surface tension of water if an extra \(3.97\;\,g\) weight is required to pull it away from water ? \(\left( {g = 980\;cm/{s^2}} \right)\)
supporting img

1 42.06 dyne/cm
2 36.02 dyne/cm
3 30.84 dyne/cm
4 47.32 dyne/cm
PHXI10:MECHANICAL PROPERTIES OF FLUIDS

361317 A \(10\;cm\) long wire is placed horizontally on the surface of water and is gently pulled up with a factor of \(2 \times {10^2}\;N\) to know the wire in equilibrium. The surface tension, in \(N{m^{ - 1}}\) of water is

1 0.1
2 0.2
3 0.001
4 0.002
PHXI10:MECHANICAL PROPERTIES OF FLUIDS

361318 A metal wire of density \(\rho\) floats on water surface horizontally. For it not to sink in water maximum possible radius of wire should be \(\frac{{{T^n}}}{{\sqrt {\pi \rho g} }}\) where, \(T\) is surface tension of water. Find \(n\).

1 0.5
2 0.8
3 0.3
4 0.9
NEET Test Series from KOTA - 10 Papers In MS WORD WhatsApp Here
PHXI10:MECHANICAL PROPERTIES OF FLUIDS

361314 The figure shows a soap film in which a closed elastic thread is lying. The film inside the thread is pricked. Now the sliding wire is moved out so that the surface area increases. The radius of the circle formed by elastic thread will
supporting img

1 Increase
2 Decrease
3 Remains same
4 Data insufficient
PHXI10:MECHANICAL PROPERTIES OF FLUIDS

361315 What is the radius of the biggest aluminium coin of thickness, \(t\) and density \(\rho\), which will still be able to float on the water surface of surface tension \(S\) ?

1 \(\dfrac{3 S}{4 \rho g t}\)
2 \(\dfrac{4 S}{3 \rho g t}\)
3 \(\dfrac{S}{\rho g t}\)
4 \(\dfrac{2 S}{\rho g t}\)
PHXI10:MECHANICAL PROPERTIES OF FLUIDS

361316 A ring is cut from a platinum tube of \(8.5\;\,cm\) internal and \(8.7\;cm\) external diameter. It is supported horizontally from a balance so that it comes in contact with the water in a glass vessel. What is the surface tension of water if an extra \(3.97\;\,g\) weight is required to pull it away from water ? \(\left( {g = 980\;cm/{s^2}} \right)\)
supporting img

1 42.06 dyne/cm
2 36.02 dyne/cm
3 30.84 dyne/cm
4 47.32 dyne/cm
PHXI10:MECHANICAL PROPERTIES OF FLUIDS

361317 A \(10\;cm\) long wire is placed horizontally on the surface of water and is gently pulled up with a factor of \(2 \times {10^2}\;N\) to know the wire in equilibrium. The surface tension, in \(N{m^{ - 1}}\) of water is

1 0.1
2 0.2
3 0.001
4 0.002
PHXI10:MECHANICAL PROPERTIES OF FLUIDS

361318 A metal wire of density \(\rho\) floats on water surface horizontally. For it not to sink in water maximum possible radius of wire should be \(\frac{{{T^n}}}{{\sqrt {\pi \rho g} }}\) where, \(T\) is surface tension of water. Find \(n\).

1 0.5
2 0.8
3 0.3
4 0.9
PHXI10:MECHANICAL PROPERTIES OF FLUIDS

361314 The figure shows a soap film in which a closed elastic thread is lying. The film inside the thread is pricked. Now the sliding wire is moved out so that the surface area increases. The radius of the circle formed by elastic thread will
supporting img

1 Increase
2 Decrease
3 Remains same
4 Data insufficient
PHXI10:MECHANICAL PROPERTIES OF FLUIDS

361315 What is the radius of the biggest aluminium coin of thickness, \(t\) and density \(\rho\), which will still be able to float on the water surface of surface tension \(S\) ?

1 \(\dfrac{3 S}{4 \rho g t}\)
2 \(\dfrac{4 S}{3 \rho g t}\)
3 \(\dfrac{S}{\rho g t}\)
4 \(\dfrac{2 S}{\rho g t}\)
PHXI10:MECHANICAL PROPERTIES OF FLUIDS

361316 A ring is cut from a platinum tube of \(8.5\;\,cm\) internal and \(8.7\;cm\) external diameter. It is supported horizontally from a balance so that it comes in contact with the water in a glass vessel. What is the surface tension of water if an extra \(3.97\;\,g\) weight is required to pull it away from water ? \(\left( {g = 980\;cm/{s^2}} \right)\)
supporting img

1 42.06 dyne/cm
2 36.02 dyne/cm
3 30.84 dyne/cm
4 47.32 dyne/cm
PHXI10:MECHANICAL PROPERTIES OF FLUIDS

361317 A \(10\;cm\) long wire is placed horizontally on the surface of water and is gently pulled up with a factor of \(2 \times {10^2}\;N\) to know the wire in equilibrium. The surface tension, in \(N{m^{ - 1}}\) of water is

1 0.1
2 0.2
3 0.001
4 0.002
PHXI10:MECHANICAL PROPERTIES OF FLUIDS

361318 A metal wire of density \(\rho\) floats on water surface horizontally. For it not to sink in water maximum possible radius of wire should be \(\frac{{{T^n}}}{{\sqrt {\pi \rho g} }}\) where, \(T\) is surface tension of water. Find \(n\).

1 0.5
2 0.8
3 0.3
4 0.9
PHXI10:MECHANICAL PROPERTIES OF FLUIDS

361314 The figure shows a soap film in which a closed elastic thread is lying. The film inside the thread is pricked. Now the sliding wire is moved out so that the surface area increases. The radius of the circle formed by elastic thread will
supporting img

1 Increase
2 Decrease
3 Remains same
4 Data insufficient
PHXI10:MECHANICAL PROPERTIES OF FLUIDS

361315 What is the radius of the biggest aluminium coin of thickness, \(t\) and density \(\rho\), which will still be able to float on the water surface of surface tension \(S\) ?

1 \(\dfrac{3 S}{4 \rho g t}\)
2 \(\dfrac{4 S}{3 \rho g t}\)
3 \(\dfrac{S}{\rho g t}\)
4 \(\dfrac{2 S}{\rho g t}\)
PHXI10:MECHANICAL PROPERTIES OF FLUIDS

361316 A ring is cut from a platinum tube of \(8.5\;\,cm\) internal and \(8.7\;cm\) external diameter. It is supported horizontally from a balance so that it comes in contact with the water in a glass vessel. What is the surface tension of water if an extra \(3.97\;\,g\) weight is required to pull it away from water ? \(\left( {g = 980\;cm/{s^2}} \right)\)
supporting img

1 42.06 dyne/cm
2 36.02 dyne/cm
3 30.84 dyne/cm
4 47.32 dyne/cm
PHXI10:MECHANICAL PROPERTIES OF FLUIDS

361317 A \(10\;cm\) long wire is placed horizontally on the surface of water and is gently pulled up with a factor of \(2 \times {10^2}\;N\) to know the wire in equilibrium. The surface tension, in \(N{m^{ - 1}}\) of water is

1 0.1
2 0.2
3 0.001
4 0.002
PHXI10:MECHANICAL PROPERTIES OF FLUIDS

361318 A metal wire of density \(\rho\) floats on water surface horizontally. For it not to sink in water maximum possible radius of wire should be \(\frac{{{T^n}}}{{\sqrt {\pi \rho g} }}\) where, \(T\) is surface tension of water. Find \(n\).

1 0.5
2 0.8
3 0.3
4 0.9