Science (086) — AI-generated practice question

The claim is incorrect.

Resistance depends not only on length and area of cross-section but also on the nature (material) of the conductor, given by $R = \rho \frac{l}{A}$, where $\rho$ is the electrical resistivity of the material. Different materials have different resistivities (e.g., copper has $1.62 \times 10^{-8}\ \Omega\text{m}$, nichrome has $100 \times 10^{-6}\ \Omega\text{m}$). So changing the material changes the resistance, which in turn changes the current ($I = V/R$).

Source: Chapter 11, Section 11.5 – Factors on which the resistance of a conductor depends

---

• Examiners want you to state clearly that the claim is wrong, then give the reason using the formula $R = \rho l/A$.
• Name resistivity ($\rho$) as the material-dependent factor — this is the key term.
• Quoting one example of contrasting resistivity values (e.g., copper vs. nichrome) strengthens the answer and shows you've read the table.
• Linking back to $I = V/R$ shows you understand why current changes — good for full marks.