Question: A thin long wire A has twice the diameter and half the length of wire B. Both wires are made of the same material. (a)

A thin long wire A has twice the diameter and half the length of wire B. Both wires are made of the same material.

(a) If the resistance of wire A equals R, find the resistance of Wire B;

(b) compare the powers Pa/Pb if the two wires are connected to a battery in parallel;

(c) find Pa/Pb if the two resistors (wires) are connected in series.

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