11th Physics Weekly Test - 4 ( Properties of Matter )

MABS Institution

11th Physics Weekly Test - 4 ( Properties of Matter )-Aug 2020

Time : 1.30 Hours

Part - A

Generic 3 - Answer All Question

Let 2.4×10⁻⁴ J of work is done to increase the area of a film of soap bubble from 50 cm² to 100 cm². Calculate the value of surface tension of soap solution.

Which is more elastic steel or rubber? Explain.

Mercury has an angle of contact equal to 140° with soda lime glass. A narrow tube of radius 2 mm, made of this glass is dipped in a trough containing mercury. By what amount does the mercury dip down in the tube relative to the liquid surface outside?. Surface tension of mercury T=0.456 N m^-1; Density of mercury \(\rho\) = 13.6 × 10³ kg m^-3

Stress - Strain curve for two wires of material A and B are as shown in figure.

(a) Which material in more ductile?
(b) Which material has greater value of young's modulus?
(c) Which of the two is stronger material?
(d) Which material is more brittle?

Write any three applications of viscosity.

In a normal adult, the average speed of the blood through the aorta (radius r = 0.8 cm) is 0.33 ms^-1. From the aorta, the blood goes into major arteries, which are 30 in number, each of radius 0.4 cm. Calculate the speed of the blood through the arteries

Water rises in a capillary tube to a height of 2.0cm. How much will the water rise through another capillary tube whose radius is one-third of the first tube?

A body floats in water with 40% of its volume outside water. When the same body floats in oil 60% of its volume, remains outside oil. What is the relative density of the oil?

A cube of wood floating in water supports a 300 g mass at the centre of its top face. When the mass is removed, the cube rises by 3 cm. Determine the volume of the cube.

A metal plate of area 2.5×10^-4m² is placed on a 0.25×10^-3m thick layer of castor oil. If a force of 2.5 N is needed to move the plate with a velocity 3×10^-2m s^-1, calculate the coefficient of viscosity of castor oil.
Given: A=2.5×10-4 m², dx = 0.25×10^-3m, F=2.5N and dv = 3×10^-2 m s^-1

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11th Physics Weekly Test - 4 ( Properties of Matter )

MABS Institution

11th Physics Weekly Test - 4 ( Properties of Matter )-Aug 2020

Part - A

Generic 3 - Answer All Question

Let 2.4×10−4 J of work is done to increase the area of a film of soap bubble from 50 cm2 to 100 cm2. Calculate the value of surface tension of soap solution.

Which is more elastic steel or rubber? Explain.

Stress - Strain curve for two wires of material A and B are as shown in figure. (a) Which material in more ductile? (b) Which material has greater value of young's modulus? (c) Which of the two is stronger material? (d) Which material is more brittle?

Write any three applications of viscosity.

In a normal adult, the average speed of the blood through the aorta (radius r = 0.8 cm) is 0.33 ms-1. From the aorta, the blood goes into major arteries, which are 30 in number, each of radius 0.4 cm. Calculate the speed of the blood through the arteries

Water rises in a capillary tube to a height of 2.0cm. How much will the water rise through another capillary tube whose radius is one-third of the first tube?

A body floats in water with 40% of its volume outside water. When the same body floats in oil 60% of its volume, remains outside oil. What is the relative density of the oil?

A cube of wood floating in water supports a 300 g mass at the centre of its top face. When the mass is removed, the cube rises by 3 cm. Determine the volume of the cube.

A metal plate of area 2.5×10-4m2 is placed on a 0.25×10-3m thick layer of castor oil. If a force of 2.5 N is needed to move the plate with a velocity 3×10-2m s-1, calculate the coefficient of viscosity of castor oil. Given: A=2.5×10-4 m2, dx = 0.25×10-3m, F=2.5N and dv = 3×10-2 m s-1

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Let 2.4×10⁻⁴ J of work is done to increase the area of a film of soap bubble from 50 cm² to 100 cm². Calculate the value of surface tension of soap solution.

Stress - Strain curve for two wires of material A and B are as shown in figure.

(a) Which material in more ductile?
(b) Which material has greater value of young's modulus?
(c) Which of the two is stronger material?
(d) Which material is more brittle?

In a normal adult, the average speed of the blood through the aorta (radius r = 0.8 cm) is 0.33 ms^-1. From the aorta, the blood goes into major arteries, which are 30 in number, each of radius 0.4 cm. Calculate the speed of the blood through the arteries

A metal plate of area 2.5×10^-4m² is placed on a 0.25×10^-3m thick layer of castor oil. If a force of 2.5 N is needed to move the plate with a velocity 3×10^-2m s^-1, calculate the coefficient of viscosity of castor oil.
Given: A=2.5×10-4 m², dx = 0.25×10^-3m, F=2.5N and dv = 3×10^-2 m s^-1