The resistance of a rod with a length of 3.0 m and a diameter of 1.0 cm is 56.0 N. If this rod is stretched to form a wire with a diameter of 0.01 cm, what is its resistance? Assume that in the process of stretching the rod, its volume did not change.

The resistance of a rod with a length of 3.0 m and a diameter of 1.0 cm is 56.0 N. If this rod is stretched to form a wire with a diameter of 0.01 cm, what is its resistance? Assume that in the process of stretching the rod, its volume did not change.

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 6CQ: Use the atomic theory of matter to explain why the resistance of a material should increase as its...

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Concept explainers

Resistivity

Resistivity is a characteristic property of the conductor’s material that measures the extent to which the material opposes the flow of current. It is denoted by the Greek letter “rho”. Electrical resistivity, also known as specific resistance, depends on the nature of the material of the conductor and is unaffected by its dimensions.

Question

The resistance of a rod with a length of 3.0 m
and a diameter of 1.0 cm is 56.0 N. If this rod is
stretched to form a wire with a diameter of 0.01 cm,
what is its resistance? Assume that in the process of
stretching the rod, its volume did not change.

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