The resistivity of alloys is $\rho_{\text{alloy}}$ and the resistivity of constituent metals is $\rho_{\text{metal}}$. Then,usually:
- A$\rho_{\text{alloy}} = \rho_{\text{metal}}$
- B$\rho_{\text{alloy}} < \rho_{\text{metal}}$
- CThere is no simple relation between $\rho_{\text{alloy}}$ and $\rho_{\text{metal}}$
- D$\rho_{\text{alloy}} > \rho_{\text{metal}}$
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