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Q. No.| Assertion (A): | On elastic bodies, though we apply force and experience elongation, it is a general practice to plot stress versus strain instead of plotting force versus elongation graph. |
| Reason (R): | Stress versus strain plotting makes the graph independent of the geometry of the sample body and reflects only the material property. |
| 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. |
The figure shows the stress-strain curve for a given material. Young's modulus for the material is:
The figure given below shows the longitudinal stress vs longitudinal strain graph for a given material. Based on the given graph, Young's modulus of the material with the increase in strain will:
1. be variable.
2. first increase & then decrease.
3. first decrease & then increase.
4. remain constant.
1.  |
2. |
3.  |
4.  |
The diagram shows stress v/s strain curve for materials A and B. From the curves, we infer that:
| 1. | A is brittle but B is ductile. |
| 2. | A is ductile and B is brittle. |
| 3. | Both A and B are ductile. |
| 4. | Both A and B are brittle. |
The ratio of Young's modulus of wire A to wire B is:
1. \(3:1\)
2. \(1:3\)
3. \(\sqrt{3}:1\)
4. \(1: \sqrt{3}\)
The stress-strain graphs for two materials are: (assume same scale).
1. Material (ii) is more elastic than material (i) and hence, material (ii) is more brittle.
2. Material (i) and (ii) have the same elasticity and the same brittleness.
3. Material (i) is elastic over a larger region of strain as compared to (ii).
4. Material (ii) is more brittle than material (i).
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Q. No.
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