- 1(current)
Q. No.Given below are two statements:
| Assertion(A): | Stress is the restoring force per unit area of a body. |
| Reason(R): | Rubber is more elastic than 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. | Both (A) and (R) are false. |
Subtopic: Â Young's modulus |
 82%
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: Â Young's modulus |
 84%
From NCERT
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Given below are two statements:
| Assertion (A): | Lead is more elastic than rubber. |
| Reason (R): | If the same load is attached to lead and rubber wires of the same cross-sectional area, the strain of lead is very much less than that of rubber. |
| 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: Â Young's modulus |
 78%
From NCERT
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A student plots a graph from his readings on the determination of Young modulus of a metal wire but forgets to put the labels (figure). The quantities on X and Y-axes may be respectively,
| (a) | weight hung and length increased |
| (b) | stress applied and length increased |
| (c) | stress applied and strain developed |
| (d) | length increased and the weight hung |
Choose the correct option:
| 1. | (a) and (b) |
| 2. | (b) and (c) |
| 3. | (a), (b) and (d) |
| 4. | all of these |
Subtopic: Â Young's modulus |
 58%
From NCERT
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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:
Choose the correct option:
| (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: Â Young's modulus |
 80%
From NCERT
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Hints
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- 1(current)
Q. No.
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