Circuits 10: Wires and Resistivity (IB Physics)

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At 7:31, there is an error! The equation is R = ρL/A. This makes the final relationship R_2 = (4)(R_1), not R_2 = (1/4)(R_1)
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I'm pretty sure you made a mistake at 7:31 as the equation of resistance is R = (pL)/A

khalilk