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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 61P

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Concept explainers

Microscopic view of current

In physics, the term current is expressed as the rate of flow of electric charges across the area per unit time (I=q/t). It propagates along in the direction of the motion of positive charges. When the current is caused by the motion of electrons, the direction of the current is opposite to the flow.

Question

With a potential difference of 4V across a wire of length 5m and cross section area 1x10^-6m² there is found to be a current of 12A flowing in the wire.

What is the conductivity of the wire?

Select one:

a. 1.5×10⁷ Siemens

b. 9.6×10⁶ Siemens

c. 6×10^-7 Siemens

d. 1.66×10⁷ Siemens

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