Question

Consider the following statements and select the correct code.
1. For a given stress, the strain produced in glass is much less than that in rubber.
2. In plastic materials, the force of cohesion are very small.
3. Elastic limit is the smallest stress which results in permanent distortion.

• A. 1, 2 and 3
• B. 1 and 2
• C. 2 and 3
• D. 1 and 3

Answer 1

The correct option is A 1, 2 and 3

1. Rubber has lower Elasticity modulus so strain is higher in rubber compared to glass.

2. In plastic, which is polymer, inter-molecular forces are very small.

3. If stress is applied beyond the Elastic limit, material suffers permanant distortion.

All statements are correct.