Physics Current Electricity Electric Conduction, Ohm's Law, Electric Current, Potential Deffrence Single Correct MCQ
Published on: September 12, 2026

The resistivity of alloys $= R_{\text{alloy}}$ ; the resistivity of constituent metals $\mathbf{R}_{\text{metal}}$ . Then, usually

A
$R_{alloy} = R_{metal}$
B
$R_{\text{alloy}} < R_{\text{metal}}$
C
There is no simple relation between $R_{\text{alloy}}$ and $R_{\text{metal}}$
D
$R_{\text{alloy}} > R_{\text{metal}}$

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The correct answer is:
C
The resistivity of a material is influenced by its composition. In alloys, the resistivity does not follow a simple additive rule. It can vary based on the specific metals present and their proportions. Therefore, there is no straightforward relation between the resistivity of the alloy and the resistivities of the constituting metals. This leads to the assertion that
Option C: There is no simple relation between the resistivities of the alloy and the constituent metals.

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