| 1 |
The first superconductor was discovered in: |
- A. 1831
- B. 1911
- C. 1921
- D. 1876
|
| 2 |
The curie temp for iron is about |
- A. 800<sup>o</sup>C
- B. 740<sup>o</sup>C
- C. 750<sup>o</sup>C
- D. 650<sup>o</sup>C
|
| 3 |
The critical temperature of Aluminum is. |
- A. 3.72 K
- B. 1.18 K
- C. 7.2 K
- D. 8.2 K
|
| 4 |
Curie temperature is a point where : |
- A. Diamagnetism changes to paramagnetism
- B. Paramagnetism changes to Diamagnetism
- C. Ferromagnetism changes to paramagnetism
- D. Paramagnetism changes to Ferromagnetism
|
| 5 |
A wire stretched to double of its length, its strain is: |
|
| 6 |
Domains are existed in |
- A. Ferromagnetic materials
- B. Paramagnetic materials
- C. Semi conductors
- D. Diamagnetic materials
|
| 7 |
Which one pair belongs to acceptor impurity. |
- A. Aresincl, phosphorus
- B. Boron, gallium
- C. Arsenic, antimony
- D. Antimony, indium
|
| 8 |
Donor impurities are |
- A. Germanium, silicon
- B. Indium, galium
- C. Antimony, arsenic
- D. Diamond, carbon
|
| 9 |
To get N-Type the Ge is doped with |
- A. Aluminium
- B. Arsenic
- C. Boron
- D. Indium
|
| 10 |
Yield stress is another name of |
- A. Plasticity
- B. Proportional limit
- C. Elastic limit
- D. Both (b) and (c)
|
