369972
Assertion : The materials which have very small range of plastic extension are called brittle materials. Reason : If the stress is increased beyond the elastic limit, the material will break before reaching ultimate tensile strength (UTS).
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but reason is correct.
Explanation:
\(\Rightarrow\) Brittle have small plastic region beyond elastic limit. The plastic range of values of stress at which a material is deformed permanently and can no longer regain original dimensions. Brittle are glass ceremic that crack beyond elastic limit. So correct option is (3).
PHXI09:MECHANICAL PROPERTIES OF SOLIDS
369973
Assertion : The material which has very small range of plastic extension are called brittle materials. Reason : Rubber does not have plastic range and the breaking point is very close to elastic limit.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but reason is correct.
Explanation:
Option (2) is correct.
PHXI09:MECHANICAL PROPERTIES OF SOLIDS
369974
The strain vs stress curves of three wires of different materials are shown in the figure. \(P\), \(Q\) and \(R\) are the elastic limits of the wires. The figure shows that
1 Elasticity of wire \(Q\) is maximum
2 Elasticity of wire \(P\) is maximum
3 Tensile strength of \(R\) is maximum
4 None of these
Explanation:
As stress is shown on \(x\) - axis and strain on y - axis \(\Rightarrow Y=\dfrac{\text { Stress }}{\text { Strain }}=\dfrac{1}{\tan \theta}=\dfrac{1}{\text { slope }}\) So the elasticity of wire \(P\) is minimum and of wire \(R\) is maximum.
PHXI09:MECHANICAL PROPERTIES OF SOLIDS
369975
Statement A : The stress-strain behaviour varies from material to material. Statement B : A rubber can be pulled to several times its original length and still returns to its original shape.
1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both statements are correct.
4 Both Statements are incorrect.
Explanation:
The stress-strain curves vary from material to material. Rubber is an elastomer, it increases several times and returns back to its original shape. So option (3) is correct.
369972
Assertion : The materials which have very small range of plastic extension are called brittle materials. Reason : If the stress is increased beyond the elastic limit, the material will break before reaching ultimate tensile strength (UTS).
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but reason is correct.
Explanation:
\(\Rightarrow\) Brittle have small plastic region beyond elastic limit. The plastic range of values of stress at which a material is deformed permanently and can no longer regain original dimensions. Brittle are glass ceremic that crack beyond elastic limit. So correct option is (3).
PHXI09:MECHANICAL PROPERTIES OF SOLIDS
369973
Assertion : The material which has very small range of plastic extension are called brittle materials. Reason : Rubber does not have plastic range and the breaking point is very close to elastic limit.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but reason is correct.
Explanation:
Option (2) is correct.
PHXI09:MECHANICAL PROPERTIES OF SOLIDS
369974
The strain vs stress curves of three wires of different materials are shown in the figure. \(P\), \(Q\) and \(R\) are the elastic limits of the wires. The figure shows that
1 Elasticity of wire \(Q\) is maximum
2 Elasticity of wire \(P\) is maximum
3 Tensile strength of \(R\) is maximum
4 None of these
Explanation:
As stress is shown on \(x\) - axis and strain on y - axis \(\Rightarrow Y=\dfrac{\text { Stress }}{\text { Strain }}=\dfrac{1}{\tan \theta}=\dfrac{1}{\text { slope }}\) So the elasticity of wire \(P\) is minimum and of wire \(R\) is maximum.
PHXI09:MECHANICAL PROPERTIES OF SOLIDS
369975
Statement A : The stress-strain behaviour varies from material to material. Statement B : A rubber can be pulled to several times its original length and still returns to its original shape.
1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both statements are correct.
4 Both Statements are incorrect.
Explanation:
The stress-strain curves vary from material to material. Rubber is an elastomer, it increases several times and returns back to its original shape. So option (3) is correct.
369972
Assertion : The materials which have very small range of plastic extension are called brittle materials. Reason : If the stress is increased beyond the elastic limit, the material will break before reaching ultimate tensile strength (UTS).
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but reason is correct.
Explanation:
\(\Rightarrow\) Brittle have small plastic region beyond elastic limit. The plastic range of values of stress at which a material is deformed permanently and can no longer regain original dimensions. Brittle are glass ceremic that crack beyond elastic limit. So correct option is (3).
PHXI09:MECHANICAL PROPERTIES OF SOLIDS
369973
Assertion : The material which has very small range of plastic extension are called brittle materials. Reason : Rubber does not have plastic range and the breaking point is very close to elastic limit.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but reason is correct.
Explanation:
Option (2) is correct.
PHXI09:MECHANICAL PROPERTIES OF SOLIDS
369974
The strain vs stress curves of three wires of different materials are shown in the figure. \(P\), \(Q\) and \(R\) are the elastic limits of the wires. The figure shows that
1 Elasticity of wire \(Q\) is maximum
2 Elasticity of wire \(P\) is maximum
3 Tensile strength of \(R\) is maximum
4 None of these
Explanation:
As stress is shown on \(x\) - axis and strain on y - axis \(\Rightarrow Y=\dfrac{\text { Stress }}{\text { Strain }}=\dfrac{1}{\tan \theta}=\dfrac{1}{\text { slope }}\) So the elasticity of wire \(P\) is minimum and of wire \(R\) is maximum.
PHXI09:MECHANICAL PROPERTIES OF SOLIDS
369975
Statement A : The stress-strain behaviour varies from material to material. Statement B : A rubber can be pulled to several times its original length and still returns to its original shape.
1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both statements are correct.
4 Both Statements are incorrect.
Explanation:
The stress-strain curves vary from material to material. Rubber is an elastomer, it increases several times and returns back to its original shape. So option (3) is correct.
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PHXI09:MECHANICAL PROPERTIES OF SOLIDS
369972
Assertion : The materials which have very small range of plastic extension are called brittle materials. Reason : If the stress is increased beyond the elastic limit, the material will break before reaching ultimate tensile strength (UTS).
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but reason is correct.
Explanation:
\(\Rightarrow\) Brittle have small plastic region beyond elastic limit. The plastic range of values of stress at which a material is deformed permanently and can no longer regain original dimensions. Brittle are glass ceremic that crack beyond elastic limit. So correct option is (3).
PHXI09:MECHANICAL PROPERTIES OF SOLIDS
369973
Assertion : The material which has very small range of plastic extension are called brittle materials. Reason : Rubber does not have plastic range and the breaking point is very close to elastic limit.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but reason is correct.
Explanation:
Option (2) is correct.
PHXI09:MECHANICAL PROPERTIES OF SOLIDS
369974
The strain vs stress curves of three wires of different materials are shown in the figure. \(P\), \(Q\) and \(R\) are the elastic limits of the wires. The figure shows that
1 Elasticity of wire \(Q\) is maximum
2 Elasticity of wire \(P\) is maximum
3 Tensile strength of \(R\) is maximum
4 None of these
Explanation:
As stress is shown on \(x\) - axis and strain on y - axis \(\Rightarrow Y=\dfrac{\text { Stress }}{\text { Strain }}=\dfrac{1}{\tan \theta}=\dfrac{1}{\text { slope }}\) So the elasticity of wire \(P\) is minimum and of wire \(R\) is maximum.
PHXI09:MECHANICAL PROPERTIES OF SOLIDS
369975
Statement A : The stress-strain behaviour varies from material to material. Statement B : A rubber can be pulled to several times its original length and still returns to its original shape.
1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both statements are correct.
4 Both Statements are incorrect.
Explanation:
The stress-strain curves vary from material to material. Rubber is an elastomer, it increases several times and returns back to its original shape. So option (3) is correct.
