How long does it take electrons to get from a car battery to the starting motor? Assume the current is 310 A and the electrons travel through a copper wire with cross-sectional area 0.160 cm2 and length 0.930 m. The number of charge carriers per unit volume is 8.49 × 1028 m-3.

How long does it take electrons to get from a car battery to the starting motor? Assume the current is 310 A and the electrons travel through a copper wire with cross-sectional area 0.160 cm2 and length 0.930 m. The number of charge carriers per unit volume is 8.49 × 1028 m-3.

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 8P: A 0.900-V potential difference is maintained across a 1.50-m length of tungsten wire that has a...

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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.

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How long does it take electrons to get from a car battery to the starting motor? Assume the current is 310 A and the electrons travel through a copper wire with cross-sectional area 0.160 cm² and length 0.930 m. The number of charge carriers per unit volume is 8.49 × 10²⁸ m^-3.

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