Given below are two statements: 
Assertion (A): Soft steel can be made red hot by continued hammering on it, but hard steel cannot.
Reason (R): Energy transfer in the case of soft is large as in hard steel.
 
1. Both (A) and (R) are True and (R) is the correct explanation of (A).
2. Both (A) and (R) are True but (R) is not the correct explanation of (A).
3. (A) is True but (R) is False.
4. (A) is False but (R) is True.

Subtopic:  Potential energy of wire |
 80%
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Given below are two statements: 
Assertion (A): Bulk modulus of elasticity \(B\) represents the incompressibility of the material.
Reason (R): \( B=-\frac{\Delta p}{\Delta V / V} \), where symbols have their usual meaning.
 
1. Both (A) and (R) are True and (R) is the correct explanation of (A).
2. Both (A) and (R) are True but (R) is not the correct explanation of (A).
3. (A) is True but (R) is False.
4. (A) is False but (R) is True.
Subtopic:  Shear and bulk modulus |
 51%
From NCERT
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Given below are two statements: 
Assertion (A): Young's modulus for a perfectly plastic body is zero.
Reason (R): For a perfectly plastic body, restoring force is zero.
1. Both (A) and (R) are True and (R) is the correct explanation of (A).
2. Both (A) and (R) are True but (R) is not the correct explanation of (A).
3. (A) is True but (R) is False.
4. Both (A) and (R) are False.
Subtopic:  Young's modulus |
 82%
From NCERT
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Given below are two statements: 
Assertion (A): The stretching of a spring is determined by the shear modulus of the material of the spring.
Reason (R): A coil spring of copper has more tensile strength than a steel spring of the same dimensions.
 
1. Both (A) and (R) are True and (R) is the correct explanation of (A).
2. Both (A) and (R) are True but (R) is not the correct explanation of (A).
3. (A) is False but (R) is True.
4. (A) is True but (R) is False.
Subtopic:  Shear and bulk modulus |
From NCERT
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A square lead slab of side \(50\) cm and thickness \(10\) cm is subject to a shearing force (on its narrow face) of \(9.0\times 10^{4}~\text{N}\). The lower edge is riveted to the floor as shown in the figure below. How much will the upper edge be displaced? (Shear modulus of lead \(= 5.6\times 10^{9}~\text{Nm}^{-2}\))

         

1. \(0.16\) mm 2. \(1.8\) mm
3. \(18\) mm 4. \(16\) mm
Subtopic:  Shear and bulk modulus |
 58%
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A copper and a steel wire of the same diameter are connected end to end. A deforming force \(F\) is applied to this composite wire which causes a total elongation of \(1\) cm. The two wires will have:
(a) the same stress (b) different stress
(c) the same strain (d) different strain

Choose the correct option:
1. (a), (b) 2. (a), (d)
3. (b), (c) 4. (c), (d)
Subtopic:  Young's modulus |
 78%
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For an ideal liquid,
(a) the bulk modulus is infinite. (b) the bulk modulus is zero.
(c) the shear modulus is infinite. (d) the shear modulus is zero.
 
Choose the correct option:
1. (a), (d)
2. (b), (d)
3. (b), (c)
4. (c), (d)
Subtopic:  Shear and bulk modulus |
 64%
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The modulus of rigidity of the ideal liquid is:
1. infinity
2. zero
3. unity
4. some finite small non-zero constant value
Subtopic:  Shear and bulk modulus |
 66%
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On withdrawing the external applied force on bodies within the elastic limit, the body:

1. regains its previous state very quickly.
2. regains its previous state after some time.
3. regains its previous state after a very long time.
4. does not regain its previous state.

Subtopic:  Stress - Strain Curve |
 68%
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If two different types of rubber are found to have stress-strain curves as shown, then:
                   

1. A is suitable for shock absorbers.
2. B is suitable for shock absorbers.
3. B is suitable for car tires.
4. None of these

Subtopic:  Stress - Strain Curve |
 75%
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