Assertion :Brittle materials such as concrete or carbon fiber do not have a yield point, and do not strain-harden. Reason: The ultimate strength and breaking strength are the same for any brittle material.

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 A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
In case of a brittle material, if we apply an external force, it instantaneously gets ruptured if the applied force is able to break it. So, they are not ductile. Therefore, they don't have any yield point they can't be represented by a stress-strain curve.

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