Mechanical Engineering Exam > Mechanical Engineering Questions > Assertion (A): Thermal diffusivity is a dimen...
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Assertion (A): Thermal diffusivity is a dimension less quantity.
Reason (R): In M-L-T-Q system the dimensions of thermal diffusivityare [L2T-1]
- a)Both A and R are individually true and R is the correct explanation of A
- b)Both A and R are individually true but R is not the correct explanation of A
- c)A is true but R is false
- d)A is false but R is true
Correct answer is option 'D'. Can you explain this answer?
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Assertion (A): Thermal diffusivity is a dimension less quantity.Reason...
Ans. (d)
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Assertion (A): Thermal diffusivity is a dimension less quantity.Reason...
Thermal Diffusivity as a Dimensionless Quantity:
• Thermal diffusivity is defined as the ratio of thermal conductivity to heat capacity per unit volume of a material.
• It is used to characterize the ability of a material to conduct heat relative to its ability to store heat.
• The dimensional formula of thermal diffusivity is [L2T-1] in the M-L-T-Q system.
• Therefore, thermal diffusivity is not a dimensionless quantity.
The Reasoning behind the Assertion:
• The statement in the assertion is false because thermal diffusivity is not a dimensionless quantity.
• The dimensions of thermal diffusivity in the M-L-T-Q system are [L2T-1], which means that it has dimensions of length squared divided by time.
• Therefore, the reasoning provided in the reason is incorrect, which makes option D the correct answer.
Conclusion:
• Thermal diffusivity is a dimensional quantity with dimensions of length squared divided by time.
• The assertion is false, and the reason provided is incorrect.
• Thermal diffusivity is defined as the ratio of thermal conductivity to heat capacity per unit volume of a material.
• It is used to characterize the ability of a material to conduct heat relative to its ability to store heat.
• The dimensional formula of thermal diffusivity is [L2T-1] in the M-L-T-Q system.
• Therefore, thermal diffusivity is not a dimensionless quantity.
The Reasoning behind the Assertion:
• The statement in the assertion is false because thermal diffusivity is not a dimensionless quantity.
• The dimensions of thermal diffusivity in the M-L-T-Q system are [L2T-1], which means that it has dimensions of length squared divided by time.
• Therefore, the reasoning provided in the reason is incorrect, which makes option D the correct answer.
Conclusion:
• Thermal diffusivity is a dimensional quantity with dimensions of length squared divided by time.
• The assertion is false, and the reason provided is incorrect.
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Assertion (A): Thermal diffusivity is a dimension less quantity.Reason...
Yes all three options are correct except first. * shear force is slope of BMD dM/dx = v (SF). ---------------> @ * load intensity is slope of SFD dV/dx= w (load intensity) * w= dV/dx w= d^2 M/dx^2. using value of V from eq. @ But the first option isn't true
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Assertion (A): Thermal diffusivity is a dimension less quantity.Reason (R): In M-L-T-Q system the dimensions of thermal diffusivityare [L2T-1] a)Both A and R are individually true and R is the correct explanation of Ab)Both A and R are individually true but R is not the correct explanation of Ac)A is true but R is falsed)A is false but R is trueCorrect answer is option 'D'. Can you explain this answer?
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Assertion (A): Thermal diffusivity is a dimension less quantity.Reason (R): In M-L-T-Q system the dimensions of thermal diffusivityare [L2T-1] a)Both A and R are individually true and R is the correct explanation of Ab)Both A and R are individually true but R is not the correct explanation of Ac)A is true but R is falsed)A is false but R is trueCorrect answer is option 'D'. Can you explain this answer? for Mechanical Engineering 2024 is part of Mechanical Engineering preparation. The Question and answers have been prepared according to the Mechanical Engineering exam syllabus. Information about Assertion (A): Thermal diffusivity is a dimension less quantity.Reason (R): In M-L-T-Q system the dimensions of thermal diffusivityare [L2T-1] a)Both A and R are individually true and R is the correct explanation of Ab)Both A and R are individually true but R is not the correct explanation of Ac)A is true but R is falsed)A is false but R is trueCorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for Mechanical Engineering 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Assertion (A): Thermal diffusivity is a dimension less quantity.Reason (R): In M-L-T-Q system the dimensions of thermal diffusivityare [L2T-1] a)Both A and R are individually true and R is the correct explanation of Ab)Both A and R are individually true but R is not the correct explanation of Ac)A is true but R is falsed)A is false but R is trueCorrect answer is option 'D'. Can you explain this answer?.
Assertion (A): Thermal diffusivity is a dimension less quantity.Reason (R): In M-L-T-Q system the dimensions of thermal diffusivityare [L2T-1] a)Both A and R are individually true and R is the correct explanation of Ab)Both A and R are individually true but R is not the correct explanation of Ac)A is true but R is falsed)A is false but R is trueCorrect answer is option 'D'. Can you explain this answer? for Mechanical Engineering 2024 is part of Mechanical Engineering preparation. The Question and answers have been prepared according to the Mechanical Engineering exam syllabus. Information about Assertion (A): Thermal diffusivity is a dimension less quantity.Reason (R): In M-L-T-Q system the dimensions of thermal diffusivityare [L2T-1] a)Both A and R are individually true and R is the correct explanation of Ab)Both A and R are individually true but R is not the correct explanation of Ac)A is true but R is falsed)A is false but R is trueCorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for Mechanical Engineering 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Assertion (A): Thermal diffusivity is a dimension less quantity.Reason (R): In M-L-T-Q system the dimensions of thermal diffusivityare [L2T-1] a)Both A and R are individually true and R is the correct explanation of Ab)Both A and R are individually true but R is not the correct explanation of Ac)A is true but R is falsed)A is false but R is trueCorrect answer is option 'D'. Can you explain this answer?.
Solutions for Assertion (A): Thermal diffusivity is a dimension less quantity.Reason (R): In M-L-T-Q system the dimensions of thermal diffusivityare [L2T-1] a)Both A and R are individually true and R is the correct explanation of Ab)Both A and R are individually true but R is not the correct explanation of Ac)A is true but R is falsed)A is false but R is trueCorrect answer is option 'D'. Can you explain this answer? in English & in Hindi are available as part of our courses for Mechanical Engineering.
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ample number of questions to practice Assertion (A): Thermal diffusivity is a dimension less quantity.Reason (R): In M-L-T-Q system the dimensions of thermal diffusivityare [L2T-1] a)Both A and R are individually true and R is the correct explanation of Ab)Both A and R are individually true but R is not the correct explanation of Ac)A is true but R is falsed)A is false but R is trueCorrect answer is option 'D'. Can you explain this answer? tests, examples and also practice Mechanical Engineering tests.
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