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Read the assertion and reason carefully to mark the correct option out of the options given below:
Assertion: Young's modulus for a perfectly plastic body is zero.
Reason: For a perfectly plastic body, restoring force is zero.
  • a)
    If both assertion and reason are true and the reason is the correct explanation of the assertion.
  • b)
    If both assertion and reason are true but reason is not the correct explanation of the assertion.
  • c)
    If assertion is true but reason is false.
  • d)
    If the assertion and reason both are false.
Correct answer is option 'A'. Can you explain this answer?
Verified Answer
Read the assertion and reason carefully to mark the correct option out...
Young's Modulus= (restoring force per unit area)/(elongation of wire/length of wire) now for a plastic body the restoring force is zero and it ultimately makes the Young's modulus zero. Hence both assertion and reason are true
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Most Upvoted Answer
Read the assertion and reason carefully to mark the correct option out...
Assertion: Young's modulus for a perfectly plastic body is zero.
Reason: For a perfectly plastic body, the restoring force is zero.

Explanation:

Young's modulus is a measure of the stiffness or rigidity of a material. It is defined as the ratio of stress to strain within the elastic limit of a material. In other words, it describes how a material deforms under an applied force.

A perfectly plastic body is one that deforms permanently and does not return to its original shape after the applied force is removed. In such a case, the material undergoes plastic deformation without any elastic deformation.

In a perfectly plastic body, the restoring force is indeed zero. The restoring force is the force that tries to bring the material back to its original shape. However, in a perfectly plastic body, there is no restoring force because the material does not have any ability to regain its original shape.

Therefore, the reason provided is correct and explains the assertion. A perfectly plastic body does not exhibit any elastic behavior, and thus its Young's modulus is zero.

Hence, the correct option is:

a) If both the assertion and reason are true and the reason is the correct explanation of the assertion.
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Read the assertion and reason carefully to mark the correct option out of the options given below:Assertion: Youngs modulus for a perfectly plastic body is zero.Reason: For a perfectly plastic body, restoring force is zero.a)If both assertion and reason are true and the reason is the correct explanation of the assertion.b)If both assertion and reason are true but reason is not the correct explanation of the assertion.c)If assertion is true but reason is false.d)If the assertion and reason both are false.Correct answer is option 'A'. Can you explain this answer?
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Read the assertion and reason carefully to mark the correct option out of the options given below:Assertion: Youngs modulus for a perfectly plastic body is zero.Reason: For a perfectly plastic body, restoring force is zero.a)If both assertion and reason are true and the reason is the correct explanation of the assertion.b)If both assertion and reason are true but reason is not the correct explanation of the assertion.c)If assertion is true but reason is false.d)If the assertion and reason both are false.Correct answer is option 'A'. Can you explain this answer? for NEET 2025 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about Read the assertion and reason carefully to mark the correct option out of the options given below:Assertion: Youngs modulus for a perfectly plastic body is zero.Reason: For a perfectly plastic body, restoring force is zero.a)If both assertion and reason are true and the reason is the correct explanation of the assertion.b)If both assertion and reason are true but reason is not the correct explanation of the assertion.c)If assertion is true but reason is false.d)If the assertion and reason both are false.Correct answer is option 'A'. Can you explain this answer? covers all topics & solutions for NEET 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Read the assertion and reason carefully to mark the correct option out of the options given below:Assertion: Youngs modulus for a perfectly plastic body is zero.Reason: For a perfectly plastic body, restoring force is zero.a)If both assertion and reason are true and the reason is the correct explanation of the assertion.b)If both assertion and reason are true but reason is not the correct explanation of the assertion.c)If assertion is true but reason is false.d)If the assertion and reason both are false.Correct answer is option 'A'. Can you explain this answer?.
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