51. Consider the following statements with regard to FCC structure:
1. Number of nearest neighbour atoms is twelve.
2. Packing efficiency is 0.74.
3. There is an atom at the body centre of the unit cell.
Which of the statements given above is/are correct?
1. Number of nearest neighbour atoms is twelve.
2. Packing efficiency is 0.74.
3. There is an atom at the body centre of the unit cell.
Which of the statements given above is/are correct?
52. Pure Metals generally have
53. Electrical conductivity, thermal conductivity and magnetic properties of ceramic material are
54. Forbidden gap in a semiconductor is
55. Which one of the following does not come under the category of ceramic material?
56. Polyethylene is produced by
57. What are the materials which exhibit electric polarization even in the absence of an applied electric field called?
58. The structure sensitive property of a superconductor is
59. A hetero-structure laser is better than a diode laser (injection laser) because of its
60. Match List-I with List-II and select the correct answer using the options given below:
List-I (Material)
List-II (Properties)
a. Superconductor at very low temperature
1. High frequency
b. Fabric chloride
2. Very small -ve susceptibility
c. Diamond
3. Very high -ve susceptibility
d. Manganese oxide
4. Susceptibility is inversely proportional to +θ
(Here T is temperature of the material in Kelvin. θ is a constant for a material).
| List-I (Material) | List-II (Properties) |
| a. Superconductor at very low temperature | 1. High frequency |
| b. Fabric chloride | 2. Very small -ve susceptibility |
| c. Diamond | 3. Very high -ve susceptibility |
| d. Manganese oxide | 4. Susceptibility is inversely proportional to +θ |
Read More Section(Materials and Components)
Each Section contains maximum 100 MCQs question on Materials and Components. To get more questions visit other sections.