MATERIALS AND COMPONENTS QUIZ

Sheet steel cored

Iron alloy cored

Ceramic cored

Cast iron cored

True

False

Thermal energy

Free electrons

Recombination

Covalent bonding

False

True

Transition temperature

Neel temperature

Curie temperature

Debye temperature

True

False

29

9

2

11

Decreases

First decreases then increases

Remains constant

Increases

Sum of residual resistivities of component metals

Dependent on the concentration of minor component in the alloy

Difference of residual resistivities of component metals

Product of residual resistivities of component metals

Resistivity of Ni will increase at all temperatures as Cu destroys the periodicity of Ni and acts as defects

Residual resistivity of Ni at low temperature will increase as Cu atoms act as defect centres

Resistivity of Ni remains the same

Resistivity of Ni will decrease at all temperatures because Cu is a better conductor than Ni