| 1 |
At 0 K a piece of silicon is a |
- A. Conductor
- B. Semi-conductor
- C. Insulator
- D. All
|
| 2 |
A wire stretched to double of its length, its strain is: |
|
| 3 |
Example of ductile substance is. |
- A. Glass
- B. Wood
- C. Lead
- D. Oxygen
|
| 4 |
Substance which break just after the elastic limit is reached are called as. |
- A. Ductile substances
- B. Hard substances
- C. Britto substances
- D. Soft substances
|
| 5 |
substance which undergo plastic deformation until they break are known as. |
- A. Brittle substances
- B. Ductile substance
- C. Non magnetic substance
- D. Magnetic substance
|
| 6 |
The SI unit of Stress is: |
- A. Nm
- B. Nm<sup>2</sup>
- C. NM<sup>-2</sup>
- D. Nm<sup>3</sup>
|
| 7 |
A semiconductor in its extremely pure form is known as: |
- A. Intrinsic
- B. Extrinsic
- C. Both a and b
- D. None of above
|
| 8 |
Those materials whose resistivity becomes zero at certain temperature is called: |
- A. Semiconductor
- B. Super conductor
- C. Conductor
- D. Insulator
|
| 9 |
Which one is pentavalent impurity |
- A. Boron
- B. Gallium
- C. Antimony
- D. Indium
|
| 10 |
Soft magnetic material is |
- A. Sodium
- B. Steel
- C. Iron
- D. Copper
|