Physics 9702 · AS & A Level · Physical quantities

Physical quantities — practice question

Wire X is a piece of wire with resistivity $\rho$, length $L$ and cross-sectional area $A$. Its resistance is $R$. A different metal is used to make a second wire, Y. Wire Y has the same resistance as X, but its length is twice that of X. Which row shows suitable values for the resistivity and cross-sectional area of Y?

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