| 1 |
Which of the modulus of elasticity is involved in compressing a rod to decrease its length ? |
- A. Young's modulus
- B. Bulk modulus
- C. Modulus of elasticity
- D. None of these
|
| 2 |
Natural rubber is an example of: |
- A. Crystalline solids
- B. Amorphous solids
- C. Polymeric solids
- D. None of above
|
| 3 |
Which one is not a ductile material |
- A. Lead
- B. Steel
- C. Copper
- D. Wrought Iron
|
| 4 |
The critical temperature of mercury is. |
- A. 1.18 K
- B. 4.2 K
- C. 3.72 K
- D. 7.2 K
|
| 5 |
Yield stress is another name of |
- A. Plasticity
- B. Proportional limit
- C. Elastic limit
- D. Both (b) and (c)
|
| 6 |
Conductors have conductivities of order: |
- A. 10<sup>3</sup>(Ωm)-1
- B. 10<sup>7</sup>(Ωm)<sup>-1</sup>
- C. 10<sup>7</sup>Ωm<sup>-1</sup>
- D. 10<sup>-6</sup>Ω
|
| 7 |
A material which is insulator at 0 K and conduct at room temperature is. |
- A. Silver
- B. Lead
- C. Germanium
- D. Polythene
|
| 8 |
In extrinsic semiconductors doping is of the order of. |
- A. 1 atom to 10<sup>4</sup>
- B. 1 atom to 10<sup>6</sup>
- C. 1 atom to 10<sup>8</sup>
- D. 1 atom to 10<sup>3</sup>
|
| 9 |
Which of the modulus of elasticity is involved in compressing a rod to decrease its length ? |
- A. Young's modulus
- B. Bulk modulus
- C. Modulus of elasticity
- D. None of these
|
| 10 |
The domain theory of magnet is important to explain the behaviour of |
- A. Diamagnets
- B. Paramagnets
- C. Ferromagnets
- D. All of these
|