Resistance and Resistivity: You are given a copper bar of dimensions 3 cm × 5 cm × 8 cm and asked to attach leads to it in order to make a resistor. If you want to achieve the largest possible resistance, you should attach the leads to the opposite faces that measure

A. 3 cm × 5 cm.
B. 3 cm × 8 cm.
C. 5 cm × 8 cm.
D. Any pair of faces produces the same resistance.


Answer: A

Physics & Space Science

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