1. Skin effect
2. Hysteresis
3. Eddy currents
4. Dielectric loss
Eddy currents
1. Ceramic compounds crystallize more slowly than metallic compounds
2. Ceramic compounds have higher melting temperatures than metallic compounds
3. Metallic compounds are better conductors of current than cermic compounds at higher temperatures
4. Ceramic compounds are able to resist greater tensile stresses than metallic compounds at room temperatures
Ceramic compounds are able to resist greater tensile stresses than metallic compounds at room temperatures
1. If forms relatively stable and hard crystals
2. It is a poor electric conductor
3. It has a high vaporization temperature
4. None of these
None of these
1. Internal stresses do not appear in the iron
2. Surface defects such as dislocations are formed
3. Surface defects from the forging operation put pressure on the interior of the iron
4. The increase in the density will cause pores and cavities in the metal to disappear
Surface defects such as dislocations are formed
1. Carbon dissolved in the α iron having a body centered cubic structure
2. Carbon dissolved in γ iron having a body-centered cubic structure
3. A mixture of body-centered α-iron having a face centered gamma iron
4. Carbon dissolved in body-centered α-iron and an Fe3C compound of higher carbon
Carbon dissolved in body-centered α-iron and an Fe3C compound of higher carbon
1. Hexagonal close packed lattice
2. Body central cubic lattice
3. Simple cubic lattice
4. None of these
Hexagonal close packed lattice
1. 400 K
2. 90 K
3. 20 K
4. 4 K
4 K
1. Large amount of non-recoverable energy absorption
2. Plastic flow
3. Deformation
4. Noise
Large amount of non-recoverable energy absorption
1. 1
2. 2
3. 4
4. 6
2
1. Aluminum is heavier than molybdenum
2. The ratio of the atoms per unit cell is lower in aluminum
3. Ratio of the number of atoms per unit cell to size of the cell is roughly equal to both
4. The distance between atoms is equal for both
The ratio of the atoms per unit cell is lower in aluminum