Two long wires are connected across the same voltage. Calculate the ratio of the power used in wire A to that used in B if the wires are identical except that (a) wire A is twice as long as B, (b) the radius of wire A is twice the radius of wire B, and (c) wire A is made of copper and wire B of aluminum.

Two long wires are connected across the same voltage. Calculate the ratio of the power used in wire A to that used in B if the wires are identical except that (a) wire A is twice as long as B, (b) the radius of wire A is twice the radius of wire B, and (c) wire A is made of copper and wire B of aluminum.

Principles of Physics: A Calculus-Based Text

5th Edition

ISBN:9781133104261

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter21: Current And Direct Current Circuits

Section: Chapter Questions

Problem 28P

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