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NEET UG PHYSICS MCQ: MECHANICAL PROPERTIES OF FLUIDS
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Medium
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Analyzing
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Given below are two statements: one is labelled as
Assertion A and the other is labelled as Reason R
Assertion A : A spherical body of radius having a particular density is falling through a
liquid of constant density. The percentage error in
the calculation of its terminal velocity is 4%.
Reason R : The terminal velocity of the spherical
body falling through the liquid is inversely
proportional to its radius.
In the light of the above statements, choose the
correct answer from the options given below
Assertion A and the other is labelled as Reason R
Assertion A : A spherical body of radius having a particular density is falling through a
liquid of constant density. The percentage error in
the calculation of its terminal velocity is 4%.
Reason R : The terminal velocity of the spherical
body falling through the liquid is inversely
proportional to its radius.
In the light of the above statements, choose the
correct answer from the options given below
View answer and explanation
Correct option: C
A is true but R is false
Option C (A is true but R is false) is correct because the percentage error calculation is valid, but the terminal velocity is directly proportional to the square of the radius, not inversely proportional to the radius.
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With the increase in temperature viscosity of a liquid -
Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R
Assertion A: When you squeeze one end of a tube to get toothpaste out from the other end, Pascal's principle is observed.
Reason R: A change in the pressure applied to an enclosed incompressible fluid is transmitted undiminished to every portion of the fluid and to the walls of its container.
In the light of the above statements, choose the most appropriate answer from the options given below. Hydraulic lifts and hydraulic brakes are based
on As the temperature of a liquid is raised, the coefficient of viscosity A horizontal pipe of cross-sectional diameter 5 cm carries water at velocity of . The pipe is connected to a smaller pipe with a cross-sectional diameter 4 cm. the velocity of water through the smaller pipe is If two soap bubble of different radii are connected by a tube
Assertion A: When you squeeze one end of a tube to get toothpaste out from the other end, Pascal's principle is observed.
Reason R: A change in the pressure applied to an enclosed incompressible fluid is transmitted undiminished to every portion of the fluid and to the walls of its container.
In the light of the above statements, choose the most appropriate answer from the options given below. Hydraulic lifts and hydraulic brakes are based
on As the temperature of a liquid is raised, the coefficient of viscosity A horizontal pipe of cross-sectional diameter 5 cm carries water at velocity of . The pipe is connected to a smaller pipe with a cross-sectional diameter 4 cm. the velocity of water through the smaller pipe is If two soap bubble of different radii are connected by a tube