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Polar section modulus is the ratio of
  • a)
    Polar moment of inertia of the shaft to the maximum radius
  • b)
    Moment of inertia of the shaft to the maximum shear stress
  • c)
    Moment of inertia of the shaft to the maximum radius
  • d)
    Polar moment of inertia of the shaft to the permissible shear stress
Correct answer is option 'A'. Can you explain this answer?
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Polar section modulus is the ratio ofa) Polar moment of inertia of th...
Polar section modulus, =Polar moment of inertia of the shaft / Maximum radius
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Polar section modulus is the ratio ofa) Polar moment of inertia of th...
Definition of Polar Section Modulus:
The polar section modulus is the ratio of the polar moment of inertia of a shaft to the maximum radius of the shaft. It is a measure of a shaft's ability to resist torsional deformation.

Explanation:
- The polar moment of inertia (J) of a shaft is a measure of its resistance to torsion and is calculated based on the shape and size of the shaft.
- The maximum radius of the shaft is the distance from the center of the shaft to the outermost point on its cross-section.
- The polar section modulus is calculated as J / R, where J is the polar moment of inertia and R is the maximum radius of the shaft.
- A higher polar section modulus indicates that the shaft is more resistant to torsional deformation, making it a crucial parameter in shaft design.

Importance of Polar Section Modulus:
- It helps in determining the strength and stability of a shaft under torsional loading.
- Engineers use this parameter to select the appropriate shaft dimensions to ensure safe and efficient operation of a mechanical system.

Conclusion:
In conclusion, the polar section modulus is calculated as the ratio of the polar moment of inertia of a shaft to its maximum radius. This parameter plays a vital role in shaft design and helps engineers ensure the structural integrity and performance of mechanical systems.
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Polar section modulus is the ratio ofa) Polar moment of inertia of the shaft to the maximum radiusb) Moment of inertia of the shaft to the maximum shear stressc) Moment of inertia of the shaft to the maximum radiusd) Polar moment of inertia of the shaft to the permissible shear stressCorrect answer is option 'A'. Can you explain this answer? for Mechanical Engineering 2025 is part of Mechanical Engineering preparation. The Question and answers have been prepared according to the Mechanical Engineering exam syllabus. Information about Polar section modulus is the ratio ofa) Polar moment of inertia of the shaft to the maximum radiusb) Moment of inertia of the shaft to the maximum shear stressc) Moment of inertia of the shaft to the maximum radiusd) Polar moment of inertia of the shaft to the permissible shear stressCorrect answer is option 'A'. Can you explain this answer? covers all topics & solutions for Mechanical Engineering 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Polar section modulus is the ratio ofa) Polar moment of inertia of the shaft to the maximum radiusb) Moment of inertia of the shaft to the maximum shear stressc) Moment of inertia of the shaft to the maximum radiusd) Polar moment of inertia of the shaft to the permissible shear stressCorrect answer is option 'A'. Can you explain this answer?.
Solutions for Polar section modulus is the ratio ofa) Polar moment of inertia of the shaft to the maximum radiusb) Moment of inertia of the shaft to the maximum shear stressc) Moment of inertia of the shaft to the maximum radiusd) Polar moment of inertia of the shaft to the permissible shear stressCorrect answer is option 'A'. Can you explain this answer? in English & in Hindi are available as part of our courses for Mechanical Engineering. Download more important topics, notes, lectures and mock test series for Mechanical Engineering Exam by signing up for free.
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