A wire is connected across a steady voltage source. (a) If that wire is replaced with one
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(a) If that wire is replaced with one of the same material that is twice as long and has twice the cross- sectional area, how will the current in the wire be affected?
(b) How will the current be affected if, instead, the new wire has the same length as the old one but half the diameter? In both cases, explain your reasoning.
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