# Question: A particular application requires a 20 m length of aluminum wire

A particular application requires a 20-m length of aluminum wire to have a 0.25-mΩ resistance at 20 oC.

(a) What is the wire’s diameter?

(b) What would its resistance be if its length was halved and it was then placed in an ice water bath?

(a) What is the wire’s diameter?

(b) What would its resistance be if its length was halved and it was then placed in an ice water bath?

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