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An aluminum rod with a square cross section is 2.3 m long and 6.5 mm on edge. (a) What is the resistance between its ends? (b) What
must be the diameter of a cylindrical copper rod of length 2.3 m if its resistance is to be the same as that of the aluminum rod? The
resistivity of aluminum is 2.75 x 10-8 Q-m and the resistivity of copper is 1.69 x 10-8 Q-m.
(a)
Number
i
Units
(b) Number
Units

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