| 1 |
The domain theory of magnet is important to explain the behaviour of |
- A. Diamagnets
- B. Paramagnets
- C. Ferromagnets
- D. All of these
|
| 2 |
To get N-Type the Ge is doped with |
- A. Aluminium
- B. Arsenic
- C. Boron
- D. Indium
|
| 3 |
The crystalline structure of NaCl is. |
- A. Cubical
- B. Hexagonal
- C. Tri gonal
- D. Tetragonal
|
| 4 |
Curie temperature is |
- A. Differen for chromium oxide and cobalt
- B. Same for chromium oxide and cobalt
- C. Same for iron and cobalt
- D. None of these
|
| 5 |
Which one of the following is polymeric solids |
- A. Glass
- B. Nylon
- C. Copper
- D. Zinc
|
| 6 |
Which one is not a crystalline solid. |
- A. Zinc
- B. Copper
- C. Nylon
- D. None of these
|
| 7 |
Which type of impurity is to be added to a pure semi conductor crystal to provide holes. |
- A. Monovalent
- B. Trivalent
- C. Tetravalent
- D. Pentavalent
|
| 8 |
The dimension of stress is |
- A. [MLT<sup>-1</sup>]
- B. [ML<sup>-1</sup>T]
- C. [ML<sup>-1</sup>T<sup>-1</sup>]
- D. [ML<sup>-1</sup>T<sup>-2</sup>]
|
| 9 |
The material whose resistivity becomes zero below a certain temperature |
- A. Conductors
- B. Semi conductors
- C. Super conductors
- D. Insulators
|
| 10 |
Which one is pentavalent impurity |
- A. Boron
- B. Gallium
- C. Antimony
- D. Indium
|
