Question
A piece of wire has a resistance $R$ . It is cut into three pieces of equal length, and the pieces are twisted together parallel to each other. What is the resistance of the resulting wire in terms of $R ?$
Step 1
When it is cut into three equal parts, the resistance of each part will be $\frac{R}{3}$, because resistance is directly proportional to the length of the wire. Show more…
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