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All questions of Floatation for UPSC CSE Exam
Which of the following factors does NOT affect the buoyant force experienced by an object in a fluid?- a)Volume of the object submerged.
- b)Density of the fluid.
- c)Weight of the object.
- d)Surface area of the object.
Correct answer is option 'D'. Can you explain this answer?
Which of the following factors does NOT affect the buoyant force experienced by an object in a fluid?
a)
Volume of the object submerged.
b)
Density of the fluid.
c)
Weight of the object.
d)
Surface area of the object.
|
Spectrum Coaching Institute answered |
The buoyant force depends on the volume of the object submerged, density of the fluid, and weight of the object. The surface area of the object does not directly affect the buoyant force.
What happens to the buoyant force acting on an object when it is partially submerged in a fluid?- a)The buoyant force increases.
- b)The buoyant force decreases.
- c)The buoyant force remains the same.
- d)The buoyant force is zero.
Correct answer is option 'C'. Can you explain this answer?
What happens to the buoyant force acting on an object when it is partially submerged in a fluid?
a)
The buoyant force increases.
b)
The buoyant force decreases.
c)
The buoyant force remains the same.
d)
The buoyant force is zero.
|
Aaditya Choudhury answered |
Understanding Buoyant Force
The buoyant force is the upward force exerted by a fluid on a submerged or partially submerged object. This force is crucial in determining whether an object sinks, floats, or remains suspended in the fluid.
Principle of Buoyancy
According to Archimedes' principle, the buoyant force acting on an object is equal to the weight of the fluid displaced by the object. This principle is applicable regardless of how much of the object is submerged.
Effect of Partial Submersion
- When an object is partially submerged, it displaces a volume of fluid equal to the submerged portion of the object.
- The buoyant force remains constant as long as the submerged volume and the density of the fluid do not change.
Key Points
- Buoyant Force is Constant: The buoyant force acting on a partially submerged object does not change with the amount of submersion as long as the displaced fluid volume remains the same.
- Weight of Displaced Fluid: The force is solely dependent on the weight of the fluid that the object displaces, not on the total volume of the object.
- Equilibrium: An object floats when the buoyant force equals the weight of the object. If the object is partially submerged, this balance indicates that the buoyant force remains equal to the weight of the displaced fluid.
Conclusion
Thus, when an object is partially submerged in a fluid, the buoyant force acting on it remains the same, confirming that the correct answer to the question is option 'C'.
The buoyant force is the upward force exerted by a fluid on a submerged or partially submerged object. This force is crucial in determining whether an object sinks, floats, or remains suspended in the fluid.
Principle of Buoyancy
According to Archimedes' principle, the buoyant force acting on an object is equal to the weight of the fluid displaced by the object. This principle is applicable regardless of how much of the object is submerged.
Effect of Partial Submersion
- When an object is partially submerged, it displaces a volume of fluid equal to the submerged portion of the object.
- The buoyant force remains constant as long as the submerged volume and the density of the fluid do not change.
Key Points
- Buoyant Force is Constant: The buoyant force acting on a partially submerged object does not change with the amount of submersion as long as the displaced fluid volume remains the same.
- Weight of Displaced Fluid: The force is solely dependent on the weight of the fluid that the object displaces, not on the total volume of the object.
- Equilibrium: An object floats when the buoyant force equals the weight of the object. If the object is partially submerged, this balance indicates that the buoyant force remains equal to the weight of the displaced fluid.
Conclusion
Thus, when an object is partially submerged in a fluid, the buoyant force acting on it remains the same, confirming that the correct answer to the question is option 'C'.
A wooden block weighs 10 N in air and 6 N in water when fuly immersed.. What is the buoyant force acting on the block?- a)4 N
- b)6 N
- c)10 N
- d)16 N
Correct answer is option 'B'. Can you explain this answer?
A wooden block weighs 10 N in air and 6 N in water when fuly immersed.. What is the buoyant force acting on the block?
a)
4 N
b)
6 N
c)
10 N
d)
16 N
|
Mira Dey answered |
Understanding Buoyant Force
The buoyant force is the upward force exerted by a fluid on an object that is fully or partially immersed in it. This force is responsible for making objects feel lighter in water compared to their weight in air.
Given Data
- Weight of the wooden block in air: 10 N
- Weight of the wooden block in water: 6 N
Calculating the Buoyant Force
To find the buoyant force acting on the block, we can use the following relationship:
- Buoyant Force = Weight in air - Weight in water
Let's calculate it:
- Weight in air = 10 N
- Weight in water = 6 N
- Buoyant Force = 10 N - 6 N
Result of the Calculation
- Buoyant Force = 4 N
Conclusion
The buoyant force acting on the block is 4 N.
Correct Answer
The options provided were:
- a) 4 N
- b) 6 N
- c) 10 N
- d) 16 N
The correct answer is option 'A', not 'B'.
Reasoning Behind the Choice
- The block weighs less in water due to the upward buoyant force acting against gravity.
- The difference in weight (10 N - 6 N) indicates the buoyant force, which is indeed 4 N.
In summary, the buoyant force is the reason the block appears lighter in water, and it is calculated by the difference in weight between air and water.
The buoyant force is the upward force exerted by a fluid on an object that is fully or partially immersed in it. This force is responsible for making objects feel lighter in water compared to their weight in air.
Given Data
- Weight of the wooden block in air: 10 N
- Weight of the wooden block in water: 6 N
Calculating the Buoyant Force
To find the buoyant force acting on the block, we can use the following relationship:
- Buoyant Force = Weight in air - Weight in water
Let's calculate it:
- Weight in air = 10 N
- Weight in water = 6 N
- Buoyant Force = 10 N - 6 N
Result of the Calculation
- Buoyant Force = 4 N
Conclusion
The buoyant force acting on the block is 4 N.
Correct Answer
The options provided were:
- a) 4 N
- b) 6 N
- c) 10 N
- d) 16 N
The correct answer is option 'A', not 'B'.
Reasoning Behind the Choice
- The block weighs less in water due to the upward buoyant force acting against gravity.
- The difference in weight (10 N - 6 N) indicates the buoyant force, which is indeed 4 N.
In summary, the buoyant force is the reason the block appears lighter in water, and it is calculated by the difference in weight between air and water.
When an object floats in a fluid, which of the following statements is true?- a)The weight of the object is equal to the weight of the fluid displaced.
- b)The weight of the object is greater than the weight of the fluid displaced.
- c)The weight of the object is less than the weight of the fluid displaced.
- d)The weight of the object is not related to the weight of the fluid displaced.
Correct answer is option 'A'. Can you explain this answer?
When an object floats in a fluid, which of the following statements is true?
a)
The weight of the object is equal to the weight of the fluid displaced.
b)
The weight of the object is greater than the weight of the fluid displaced.
c)
The weight of the object is less than the weight of the fluid displaced.
d)
The weight of the object is not related to the weight of the fluid displaced.
|
Goel UPSC Coaching Center answered |
When an object floats, it displaces a volume of fluid equal to its own volume. According to Archimedes' principle, the buoyant force acting on the object is equal to the weight of the displaced fluid, which is also equal to the weight of the object.
Which of the following statements is true regarding the stability of a submerged object?- a)An object is more stable when its center of gravity is above its center of buoyancy.
- b)An object is more stable when its center of gravity is below its center of buoyancy.
- c)An object's stability is not affected by the relationship between the center of gravity and the center of buoyancy.
- d)An object's stability depends on the density of the fluid it is submerged in.
Correct answer is option 'B'. Can you explain this answer?
Which of the following statements is true regarding the stability of a submerged object?
a)
An object is more stable when its center of gravity is above its center of buoyancy.
b)
An object is more stable when its center of gravity is below its center of buoyancy.
c)
An object's stability is not affected by the relationship between the center of gravity and the center of buoyancy.
d)
An object's stability depends on the density of the fluid it is submerged in.
|
Paradigm Institute answered |
Similar to a floating object, the stability of a submerged object is increased when its center of gravity is below its center of buoyancy. This ensures that any tilting or disturbance will create a restoring torque, bringing the object back to equilibrium.
A block of wood floats in water with two-thirds of its volume submerged. What can you conclude about the density of the wood compared to the density of water?- a)The density of the wood is equal to the density of water.
- b)The density of the wood is greater than the density of water.
- c)The density of the wood is less than the density of water.
- d)The density of the wood cannot be determined from the given information.
Correct answer is option 'B'. Can you explain this answer?
A block of wood floats in water with two-thirds of its volume submerged. What can you conclude about the density of the wood compared to the density of water?
a)
The density of the wood is equal to the density of water.
b)
The density of the wood is greater than the density of water.
c)
The density of the wood is less than the density of water.
d)
The density of the wood cannot be determined from the given information.
|
KS Coaching Center answered |
If two-thirds of the wood's volume is submerged in water, it means that the wood is less dense than water. The density of the wood is greater than the density of water because it sinks but only partially.
A ship floats in water because:- a)The weight of the ship is greater than the buoyant force.
- b)The weight of the ship is less than the buoyant force.
- c)The weight of the ship is equal to the buoyant force.
- d)The weight of the ship is not related to the buoyant force.
Correct answer is option 'B'. Can you explain this answer?
A ship floats in water because:
a)
The weight of the ship is greater than the buoyant force.
b)
The weight of the ship is less than the buoyant force.
c)
The weight of the ship is equal to the buoyant force.
d)
The weight of the ship is not related to the buoyant force.
|
|
Paradigm Institute answered |
According to Archimedes' principle, an object floats when the buoyant force acting on it is equal to or greater than its weight. In the case of a ship, the weight of the ship is less than the buoyant force exerted by the water, allowing it to float.
Which of the following statements is true regarding the center of buoyancy?- a)It is the point at which the weight of the object acts.
- b)It is the point at which the buoyant force acts.
- c)It is the point at which the object is in equilibrium.
- d)It is the point at which the object's center of gravity is located.
Correct answer is option 'B'. Can you explain this answer?
Which of the following statements is true regarding the center of buoyancy?
a)
It is the point at which the weight of the object acts.
b)
It is the point at which the buoyant force acts.
c)
It is the point at which the object is in equilibrium.
d)
It is the point at which the object's center of gravity is located.
|
Catalyst Learningacademy answered |
The center of buoyancy is the point at which the buoyant force acts on an object immersed in a fluid. It is the center of mass of the displaced fluid.
The ability of an object to float in a fluid depends on:- a)The object's mass.
- b)The object's volume.
- c)The object's shape.
- d)All of the above.
Correct answer is option 'D'. Can you explain this answer?
The ability of an object to float in a fluid depends on:
a)
The object's mass.
b)
The object's volume.
c)
The object's shape.
d)
All of the above.
|
|
Paradigm Institute answered |
The ability of an object to float in a fluid depends on various factors, including its mass, volume, and shape. All of these factors affect theobject's buoyancy and determine whether it will float or sink.
According to Archimedes' principle, an object immersed in a fluid experiences an upward buoyant force equal to the weight of the displaced fluid. Which of the following statements best describes this principle?
- a)An object will float if its weight is less than the buoyant force.
- b)An object will sink if its weight is equal to the buoyant force.
- c)An object will sink if its weight is lesser than the buoyant force.
- d)An object will float if its weight is greater than the buoyant force.
Correct answer is option 'A'. Can you explain this answer?
According to Archimedes' principle, an object immersed in a fluid experiences an upward buoyant force equal to the weight of the displaced fluid. Which of the following statements best describes this principle?
a)
An object will float if its weight is less than the buoyant force.
b)
An object will sink if its weight is equal to the buoyant force.
c)
An object will sink if its weight is lesser than the buoyant force.
d)
An object will float if its weight is greater than the buoyant force.
|
Lohit Matani answered |
When an object is immersed in a fluid, it experiences an upward buoyant force equal to the weight of the displaced fluid. If the weight of the object is less than the buoyant force, it will float.
Which of the following statements is true regarding the buoyant force?- a)It acts in the same direction as the weight of the object.
- b)It acts in the opposite direction to the weight of the object.
- c)It acts perpendicular to the surface of the fluid.
- d)It acts parallel to the surface of the fluid.
Correct answer is option 'B'. Can you explain this answer?
Which of the following statements is true regarding the buoyant force?
a)
It acts in the same direction as the weight of the object.
b)
It acts in the opposite direction to the weight of the object.
c)
It acts perpendicular to the surface of the fluid.
d)
It acts parallel to the surface of the fluid.
|
|
Catalyst Learningacademy answered |
The buoyant force acts in the opposite direction to the weight of the object. It is an upward force exerted by the fluid on the object.
According to the law of floatation, when an object is immersed in a fluid, it displaces a volume of fluid equal to its own volume. This is known as:- a)Archimedes' principle
- b)Pascal's law
- c)Buoyant force
- d)Principle of displacement
Correct answer is option 'D'. Can you explain this answer?
According to the law of floatation, when an object is immersed in a fluid, it displaces a volume of fluid equal to its own volume. This is known as:
a)
Archimedes' principle
b)
Pascal's law
c)
Buoyant force
d)
Principle of displacement
|
|
KS Coaching Center answered |
The principle of displacement states that when an object is immersed in a fluid, it displaces a volume of fluid equal to its own volume. This principle is a fundamental concept related to Archimedes' principle.
The principle of floatation can be used to determine the ______ of an object.- a)Volume
- b)Density
- c)Weight
- d)Pressure
Correct answer is option 'B'. Can you explain this answer?
The principle of floatation can be used to determine the ______ of an object.
a)
Volume
b)
Density
c)
Weight
d)
Pressure
|
|
Paradigm Institute answered |
The principle of floatation can be used to determine the density of an object. By measuring the weight of the object in air and in a fluid, and knowing the density of the fluid, the density of the object can be calculated.
An object floats in a fluid if its average density is:- a)Equal to the density of the fluid.
- b)Greater than the density of the fluid.
- c)Less than the density of the fluid.
- d)Unrelated to the density of the fluid.
Correct answer is option 'A'. Can you explain this answer?
An object floats in a fluid if its average density is:
a)
Equal to the density of the fluid.
b)
Greater than the density of the fluid.
c)
Less than the density of the fluid.
d)
Unrelated to the density of the fluid.
|
|
Catalyst Learningacademy answered |
An object floats in a fluid when its average density is equal to the density of the fluid. The average density is calculated by dividing the object's mass by its volume.
The pressure at any point in a fluid at rest is transmitted ______.- a)Equally in all directions.
- b)Only in the upward direction.
- c)Only in the downward direction.
- d)In the direction of the fluid flow.
Correct answer is option 'A'. Can you explain this answer?
The pressure at any point in a fluid at rest is transmitted ______.
a)
Equally in all directions.
b)
Only in the upward direction.
c)
Only in the downward direction.
d)
In the direction of the fluid flow.
|
|
KS Coaching Center answered |
According to Pascal's law, the pressure in a fluid at rest is transmitted equally in all directions. This is why, for example, when you squeeze a closed container filled with fluid, the pressure is distributed uniformly throughout the fluid.
The principle of floatation is based on the law of:- a)Conservation of mass.
- b)Conservation of energy.
- c)Conservation of momentum.
- d)Conservation of volume.
Correct answer is option 'D'. Can you explain this answer?
The principle of floatation is based on the law of:
a)
Conservation of mass.
b)
Conservation of energy.
c)
Conservation of momentum.
d)
Conservation of volume.
|
|
Paradigm Institute answered |
The principle of floatation is not directly related to the conservation of mass, energy, or momentum. It is based on the law of conservation of volume, which states that the volume of fluid displaced by an object is equal to the volume of the object.
According to the law of floatation, an object will float in a fluid if the buoyant force is:- a)Less than the weight of the object
- b)Equal to the weight of the object
- c)Greater than the weight of the object
- d)Unrelated to the weight of the object
Correct answer is option 'B'. Can you explain this answer?
According to the law of floatation, an object will float in a fluid if the buoyant force is:
a)
Less than the weight of the object
b)
Equal to the weight of the object
c)
Greater than the weight of the object
d)
Unrelated to the weight of the object
|
|
KS Coaching Center answered |
According to the law of floatation, an object will float in a fluid if the buoyant force is equal to the weight of the object.
Therefore, the correct answer is b) Equal to the weight of the object.
Which of the following objects will sink in a fluid?- a)An object with a density greater than the fluid.
- b)An object with a density equal to the fluid.
- c)An object with a density less than the fluid.
- d)All objects will sink in a fluid.
Correct answer is option 'A'. Can you explain this answer?
Which of the following objects will sink in a fluid?
a)
An object with a density greater than the fluid.
b)
An object with a density equal to the fluid.
c)
An object with a density less than the fluid.
d)
All objects will sink in a fluid.
|
|
Catalyst Learningacademy answered |
An object will sink in a fluid if its density is greater than the density of the fluid. The density of an object can be calculated by dividing its mass by its volume.
Pascal's law states that pressure applied to a fluid is transmitted undiminished in all directions. Which of the following devices operates on this principle?- a)Hydraulic lift.
- b)Centrifuge.
- c)Barometer.
- d)Electroscope.
Correct answer is option 'A'. Can you explain this answer?
Pascal's law states that pressure applied to a fluid is transmitted undiminished in all directions. Which of the following devices operates on this principle?
a)
Hydraulic lift.
b)
Centrifuge.
c)
Barometer.
d)
Electroscope.
|
Master Training Institute answered |
Pascal's law states that pressure applied to a fluid is transmitted undiminished in all directions. A hydraulic lift utilizes this principle to generate a large force by applying a small force to a confined fluid, which is then transmitted to lift a heavier load.
Which of the following statements is true regarding the stability of a floating object?- a)An object is more stable when its center of gravity is above its center of buoyancy.
- b)An object is more stable when its center of gravity is below its center of buoyancy.
- c)An object's stability is not affected by the relationship between the center of gravity and the center of buoyancy.
- d)An object's stability depends on the density of the fluid it is floating in.
Correct answer is option 'B'. Can you explain this answer?
Which of the following statements is true regarding the stability of a floating object?
a)
An object is more stable when its center of gravity is above its center of buoyancy.
b)
An object is more stable when its center of gravity is below its center of buoyancy.
c)
An object's stability is not affected by the relationship between the center of gravity and the center of buoyancy.
d)
An object's stability depends on the density of the fluid it is floating in.
|
|
Catalyst Learningacademy answered |
For a floating object to be stable, its center of gravity should be below its center of buoyancy. This ensures that any small tilting or displacement will create a restoring torque, causing the object to return to its equilibrium position.
Chapter doubts & questions for Floatation - Lucent For GK 2025 is part of UPSC CSE exam preparation. The chapters have been prepared according to the UPSC CSE exam syllabus. The Chapter doubts & questions, notes, tests & MCQs are made for UPSC CSE 2025 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests here.
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