Assertion :Brittle materials do not exhibit an identifiable yield point; rather, they fail by brittle fracture. Reason: The value of the largest stress in tension and compression defines the ultimate strength.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Both Assertion and Reason are incorrect

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Solution

The correct option is B Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
In case of a brittle materials, if we apply an external force above its elastic strength then if gets ruptured instantaneously. So,one does not get a specific yield point in this case.
Ultimate strength is the maximum stress applied beyond which the materials breaks.

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