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Suppose you have a real wire made of copper $($a good conductor$)$ that has a certain length and cross sectional area. What will happen to the resistance of the wire if the following changes are made?

Resistance stays the same

The length of the wire is increased

Resistance stays the same The width of the wire is increased

Resistance decreases The copper in the wire is replaced with plastic $($an insulator$)$

Resistance increases The current through the wire is increased

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