369967
Assertion : Stress is the internal force per unit area of a body. Reason : Rubber is more elastic than steel.
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:
The internal restoring force acting per unit area of cross-section of the deformed body is called stress. Also elasticity is the property of the material of a body by virtue of which it opposes any change in its size or shape. Hence, steel is more elastic than rubber. Option (3) is correct.
PHXI09:MECHANICAL PROPERTIES OF SOLIDS
369968
The linear portion of a stress-strain curve obeys Hooke's law. The upper limit of this linear curve represents
1 Yield point
2 Permanent set
3 Fracture point
4 Proportional limit
Explanation:
Conceptual Question
PHXI09:MECHANICAL PROPERTIES OF SOLIDS
369969
Figure shows graph between stress and strain for a uniform wire at two different temperatures. then
1 \(T_{2}>T_{1}\)
2 \(T_{1}>T_{2}\)
3 \(T_{1}=T_{2}\)
4 None of these
Explanation:
Young's modulus of the material decreases with increase in temperature. \(Y_{2}>Y_{1} \Rightarrow T_{1}>T_{2}\)
PHXI09:MECHANICAL PROPERTIES OF SOLIDS
369970
In case of steel wire or a metal wire, the elastic limit is reached when
1 the wire just break
2 the load is more than the weight of wire
3 elongation is inversely proportional to the tension
4 None of the above
Explanation:
In case of steel wire or metal wire, for elastic limit to reach none of the above three options are correct. Elastic limit means the maximum value of strain for which a body shows elastic property. In Hooke's law, a proportionality exists between stress and only small strains. Iron is a ductile material, it has a widely separated dfracture point (the point where the wire breaks) from the elastic limit. Moreover elongation is directly proportional to the tension, hence none of the options are correct. It can be explained with the help of stress-strain curve also.
PHXI09:MECHANICAL PROPERTIES OF SOLIDS
369971
Solids which break above the elastic limit are called
369967
Assertion : Stress is the internal force per unit area of a body. Reason : Rubber is more elastic than steel.
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:
The internal restoring force acting per unit area of cross-section of the deformed body is called stress. Also elasticity is the property of the material of a body by virtue of which it opposes any change in its size or shape. Hence, steel is more elastic than rubber. Option (3) is correct.
PHXI09:MECHANICAL PROPERTIES OF SOLIDS
369968
The linear portion of a stress-strain curve obeys Hooke's law. The upper limit of this linear curve represents
1 Yield point
2 Permanent set
3 Fracture point
4 Proportional limit
Explanation:
Conceptual Question
PHXI09:MECHANICAL PROPERTIES OF SOLIDS
369969
Figure shows graph between stress and strain for a uniform wire at two different temperatures. then
1 \(T_{2}>T_{1}\)
2 \(T_{1}>T_{2}\)
3 \(T_{1}=T_{2}\)
4 None of these
Explanation:
Young's modulus of the material decreases with increase in temperature. \(Y_{2}>Y_{1} \Rightarrow T_{1}>T_{2}\)
PHXI09:MECHANICAL PROPERTIES OF SOLIDS
369970
In case of steel wire or a metal wire, the elastic limit is reached when
1 the wire just break
2 the load is more than the weight of wire
3 elongation is inversely proportional to the tension
4 None of the above
Explanation:
In case of steel wire or metal wire, for elastic limit to reach none of the above three options are correct. Elastic limit means the maximum value of strain for which a body shows elastic property. In Hooke's law, a proportionality exists between stress and only small strains. Iron is a ductile material, it has a widely separated dfracture point (the point where the wire breaks) from the elastic limit. Moreover elongation is directly proportional to the tension, hence none of the options are correct. It can be explained with the help of stress-strain curve also.
PHXI09:MECHANICAL PROPERTIES OF SOLIDS
369971
Solids which break above the elastic limit are called
369967
Assertion : Stress is the internal force per unit area of a body. Reason : Rubber is more elastic than steel.
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:
The internal restoring force acting per unit area of cross-section of the deformed body is called stress. Also elasticity is the property of the material of a body by virtue of which it opposes any change in its size or shape. Hence, steel is more elastic than rubber. Option (3) is correct.
PHXI09:MECHANICAL PROPERTIES OF SOLIDS
369968
The linear portion of a stress-strain curve obeys Hooke's law. The upper limit of this linear curve represents
1 Yield point
2 Permanent set
3 Fracture point
4 Proportional limit
Explanation:
Conceptual Question
PHXI09:MECHANICAL PROPERTIES OF SOLIDS
369969
Figure shows graph between stress and strain for a uniform wire at two different temperatures. then
1 \(T_{2}>T_{1}\)
2 \(T_{1}>T_{2}\)
3 \(T_{1}=T_{2}\)
4 None of these
Explanation:
Young's modulus of the material decreases with increase in temperature. \(Y_{2}>Y_{1} \Rightarrow T_{1}>T_{2}\)
PHXI09:MECHANICAL PROPERTIES OF SOLIDS
369970
In case of steel wire or a metal wire, the elastic limit is reached when
1 the wire just break
2 the load is more than the weight of wire
3 elongation is inversely proportional to the tension
4 None of the above
Explanation:
In case of steel wire or metal wire, for elastic limit to reach none of the above three options are correct. Elastic limit means the maximum value of strain for which a body shows elastic property. In Hooke's law, a proportionality exists between stress and only small strains. Iron is a ductile material, it has a widely separated dfracture point (the point where the wire breaks) from the elastic limit. Moreover elongation is directly proportional to the tension, hence none of the options are correct. It can be explained with the help of stress-strain curve also.
PHXI09:MECHANICAL PROPERTIES OF SOLIDS
369971
Solids which break above the elastic limit are called
369967
Assertion : Stress is the internal force per unit area of a body. Reason : Rubber is more elastic than steel.
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:
The internal restoring force acting per unit area of cross-section of the deformed body is called stress. Also elasticity is the property of the material of a body by virtue of which it opposes any change in its size or shape. Hence, steel is more elastic than rubber. Option (3) is correct.
PHXI09:MECHANICAL PROPERTIES OF SOLIDS
369968
The linear portion of a stress-strain curve obeys Hooke's law. The upper limit of this linear curve represents
1 Yield point
2 Permanent set
3 Fracture point
4 Proportional limit
Explanation:
Conceptual Question
PHXI09:MECHANICAL PROPERTIES OF SOLIDS
369969
Figure shows graph between stress and strain for a uniform wire at two different temperatures. then
1 \(T_{2}>T_{1}\)
2 \(T_{1}>T_{2}\)
3 \(T_{1}=T_{2}\)
4 None of these
Explanation:
Young's modulus of the material decreases with increase in temperature. \(Y_{2}>Y_{1} \Rightarrow T_{1}>T_{2}\)
PHXI09:MECHANICAL PROPERTIES OF SOLIDS
369970
In case of steel wire or a metal wire, the elastic limit is reached when
1 the wire just break
2 the load is more than the weight of wire
3 elongation is inversely proportional to the tension
4 None of the above
Explanation:
In case of steel wire or metal wire, for elastic limit to reach none of the above three options are correct. Elastic limit means the maximum value of strain for which a body shows elastic property. In Hooke's law, a proportionality exists between stress and only small strains. Iron is a ductile material, it has a widely separated dfracture point (the point where the wire breaks) from the elastic limit. Moreover elongation is directly proportional to the tension, hence none of the options are correct. It can be explained with the help of stress-strain curve also.
PHXI09:MECHANICAL PROPERTIES OF SOLIDS
369971
Solids which break above the elastic limit are called
369967
Assertion : Stress is the internal force per unit area of a body. Reason : Rubber is more elastic than steel.
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:
The internal restoring force acting per unit area of cross-section of the deformed body is called stress. Also elasticity is the property of the material of a body by virtue of which it opposes any change in its size or shape. Hence, steel is more elastic than rubber. Option (3) is correct.
PHXI09:MECHANICAL PROPERTIES OF SOLIDS
369968
The linear portion of a stress-strain curve obeys Hooke's law. The upper limit of this linear curve represents
1 Yield point
2 Permanent set
3 Fracture point
4 Proportional limit
Explanation:
Conceptual Question
PHXI09:MECHANICAL PROPERTIES OF SOLIDS
369969
Figure shows graph between stress and strain for a uniform wire at two different temperatures. then
1 \(T_{2}>T_{1}\)
2 \(T_{1}>T_{2}\)
3 \(T_{1}=T_{2}\)
4 None of these
Explanation:
Young's modulus of the material decreases with increase in temperature. \(Y_{2}>Y_{1} \Rightarrow T_{1}>T_{2}\)
PHXI09:MECHANICAL PROPERTIES OF SOLIDS
369970
In case of steel wire or a metal wire, the elastic limit is reached when
1 the wire just break
2 the load is more than the weight of wire
3 elongation is inversely proportional to the tension
4 None of the above
Explanation:
In case of steel wire or metal wire, for elastic limit to reach none of the above three options are correct. Elastic limit means the maximum value of strain for which a body shows elastic property. In Hooke's law, a proportionality exists between stress and only small strains. Iron is a ductile material, it has a widely separated dfracture point (the point where the wire breaks) from the elastic limit. Moreover elongation is directly proportional to the tension, hence none of the options are correct. It can be explained with the help of stress-strain curve also.
PHXI09:MECHANICAL PROPERTIES OF SOLIDS
369971
Solids which break above the elastic limit are called
