Materials and Components
Which of the following are true for relative dielectric constant?1. It is dimensionless.2. It is equal to 1 for vacuum.3. It is equal to 1 for all substances.

1, 2 and 3
2 and 3 only
1 and 3 only
1 and 2 only

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Materials and Components
The residual resistivity of a binary alloy at 0 K is

Product of residual resistivities of component metals
Dependent on the concentration of minor component in the alloy
Sum of residual resistivities of component metals
Difference of residual resistivities of component metals

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