| 1 |
The SI unit of Stress is: |
- A. Nm
- B. Nm<sup>2</sup>
- C. NM<sup>-2</sup>
- D. Nm<sup>3</sup>
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| 2 |
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
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| 3 |
Donor impurities are |
- A. Germanium, silicon
- B. Indium, galium
- C. Antimony, arsenic
- D. Diamond, carbon
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| 4 |
Which one of the following is crystalline solid. |
- A. Zirconia
- B. Glassy solid
- C. Natural rubber
- D. Poly strene
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| 5 |
A solid having regular arrangement of molecules throughout its structure is called. |
- A. Amorphous solid
- B. Polymeric solid
- C. Crystalline solid
- D. Glassy solid
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| 6 |
Glass and high steel carbon are example of. |
- A. Ductile substances
- B. Brittle substances
- C. Soft substances
- D. Hard substances
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| 7 |
Which of the following does not undergo plastic deformation. |
- A. Copper
- B. Wrought iron
- C. Head
- D. Glass
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| 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
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| 9 |
Out of the following which material is brittle. |
- A. Wrought iron
- B. Copper
- C. Tungsten
- D. High steel carbon
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| 10 |
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
|