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Test: Laws of Floatation - UPSC MCQ


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20 Questions MCQ Test Famous Books for UPSC Exam (Summary & Tests) - Test: Laws of Floatation

Test: Laws of Floatation for UPSC 2024 is part of Famous Books for UPSC Exam (Summary & Tests) preparation. The Test: Laws of Floatation questions and answers have been prepared according to the UPSC exam syllabus.The Test: Laws of Floatation MCQs are made for UPSC 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Laws of Floatation below.
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Test: Laws of Floatation - Question 1

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?

Detailed Solution for Test: Laws of Floatation - Question 1

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.

Test: Laws of Floatation - Question 2

Which of the following factors does NOT affect the buoyant force experienced by an object in a fluid?

Detailed Solution for Test: Laws of Floatation - Question 2

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.

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Test: Laws of Floatation - Question 3

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?

Detailed Solution for Test: Laws of Floatation - Question 3

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.

Test: Laws of Floatation - Question 4

What happens to the buoyant force acting on an object when it is partially submerged in a fluid?

Detailed Solution for Test: Laws of Floatation - Question 4

The buoyant force experienced by an object in a fluid depends on the weight of the displaced fluid, which is determined by the volume of the object submerged. If the object is partially submerged, the volume of the displaced fluid and thus the buoyant force remain the same.

Test: Laws of Floatation - Question 5

When an object floats in a fluid, which of the following statements is true?

Detailed Solution for Test: Laws of Floatation - Question 5

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.

Test: Laws of Floatation - Question 6

Which of the following statements is true regarding the stability of a floating object?

Detailed Solution for Test: Laws of Floatation - Question 6

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.

Test: Laws of Floatation - Question 7

The principle of floatation can be used to determine the ______ of an object.

Detailed Solution for Test: Laws of Floatation - Question 7

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.

Test: Laws of Floatation - Question 8

Which principle states that an object submerged in a fluid experiences a buoyant force equal to the weight of the fluid it displaces?

Detailed Solution for Test: Laws of Floatation - Question 8

Archimedes' principle states that an object immersed in a fluid experiences an upward buoyant force equal to the weight of the fluid it displaces. This principle explains why objects float or sink in fluids.

Test: Laws of Floatation - Question 9

Which of the following statements is true regarding the buoyant force?

Detailed Solution for Test: Laws of Floatation - Question 9

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.

Test: Laws of Floatation - Question 10

A ship floats in water because:

Detailed Solution for Test: Laws of Floatation - Question 10

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.

Test: Laws of Floatation - Question 11

A wooden block weighs 10 N in air and 6 N in water. What is the buoyant force acting on the block?

Detailed Solution for Test: Laws of Floatation - Question 11

The buoyant force is equal to the weight of the fluid displaced by the object. In this case, the block weighs 10 N in air and 6 N in water, indicating that it loses 4 N of weight in water. Therefore, the buoyant force is 6 N, equal to the weight lost in water.

Test: Laws of Floatation - Question 12

An object floats in a fluid if its average density is:

Detailed Solution for Test: Laws of Floatation - Question 12

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.

Test: Laws of Floatation - Question 13

Which of the following statements is true regarding the stability of a submerged object?

Detailed Solution for Test: Laws of Floatation - Question 13

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.

Test: Laws of Floatation - Question 14

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?

Detailed Solution for Test: Laws of Floatation - Question 14

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.

Test: Laws of Floatation - Question 15

Which of the following objects will sink in a fluid?

Detailed Solution for Test: Laws of Floatation - Question 15

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.

Test: Laws of Floatation - Question 16

The principle of floatation is based on the law of:

Detailed Solution for Test: Laws of Floatation - Question 16

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.

Test: Laws of Floatation - Question 17

The pressure at any point in a fluid at rest is transmitted ______.

Detailed Solution for Test: Laws of Floatation - Question 17

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.

Test: Laws of Floatation - Question 18

Which of the following statements is true regarding the center of buoyancy?

Detailed Solution for Test: Laws of Floatation - Question 18

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.

Test: Laws of Floatation - Question 19

The ability of an object to float in a fluid depends on:

Detailed Solution for Test: Laws of Floatation - Question 19

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.

Test: Laws of Floatation - Question 20

According to the law of floatation, an object will float in a fluid if the buoyant force is:

Detailed Solution for Test: Laws of Floatation - Question 20

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.

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