- The second neighbour distance in a simple cubic system having lattice constant a is:
- \sqrt{2}a
- a
- \frac{\sqrt{3}}{2}a
- \sqrt{3}a
- If the Debye characteristic frequency for copper is 6.55\times10^{12}Hz, the Debye temperature for copper is :
- 200K
- 314.5K
- 405K
- 150K
- If the concentration of Schotty defects in a fcc crystal is 1 in 10^{10} at 300^oK, the energy of formation in eV of Schottky defects will be
- 0.60
- 0.50
- 0.40
- 1.0
- Van der Waals attractive interaction between inert gas atoms varies with interatomic separation (R) as :
- -\frac{1}{R^2}
- -\frac{1}{R^3}
- -\frac{1}{R^6}
- -\frac{1}{R^{12}}
- Metallic nickel crystallizes in fcc-type structure with lattice constant a. The interplanar distance between the diffracting planes (220) is this material is :
- \frac{a}{2\sqrt{2}}
- \frac{a}{2}
- \frac{\sqrt{3}}{2}a
- \frac{a}{\sqrt{2}}
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Friday, 2 December 2016
Problem set 34
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