| 1 |
Young's modulus for water's is |
|
| 2 |
The critical temperature of mercury is. |
- A. 1.18 K
- B. 4.2 K
- C. 3.72 K
- D. 7.2 K
|
| 3 |
The SI unit of stress is same as that of. |
- A. Pressure
- B. Force
- C. Momentum
- D. Work
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| 4 |
Donor impurities are |
- A. Germanium, silicon
- B. Indium, galium
- C. Antimony, arsenic
- D. Diamond, carbon
|
| 5 |
A cable breaks if stretched by more than 2mm. It is cut into two equal parts. How much either part can be stretched without breaking? |
- A. 25 m
- B. 1mm
- C. 2mm
- D. 0.5 m
|
| 6 |
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>
|
| 7 |
If both the length and radius of the rod are doubled, then the modulus of elasticity will: |
- A. Increase
- B. Decrease
- C. Remains the same
- D. Doubled
|
| 8 |
A pentaralent impurity in Si |
- A. a free electron and a free hole
- B. a free hole
- C. a free electron
- D. No free particle
|
| 9 |
The solids are classified as |
- A. Polymeric
- B. Amorphous
- C. Crystalline
- D. All of above
|
| 10 |
The number of crystal system are |
- A. Three
- B. Five
- C. Seven
- D. Fifteen
|