A copper wire has radius $0\mathrm{.}800$ mmmm and carries current II at $20\mathrm{.}0$C$$C$.$ A silver wire with radius $0\mathrm{.}500$ mmmm carries the same current and is also at $20\mathrm{.}0$C$$C$.$ Let ECuECu be the electric field in the copper wire and EAgEAg be the electric field in the silver wire. Use the resistivities at room temperature for copper CuCu $=1\mathrm{.}721081\mathrm{.}72108$m$$m and for silver AgAg $=1\mathrm{.}471081\mathrm{.}47108$m$$m$.$

Part A

What is the ratio ECu$/$EAgECu$/$EAg$?$

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ECuEAgECuEAg $=$

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