Answered: /s. What is (a) the magnitude of the…

/s. What is (a) the magnitude of the current density and (b) direction of the current density J .(c) What additional quantity do ou need to calculate the total current i in this ion beam?

University Physics Volume 2

18th Edition

ISBN:9781938168161

Author:OpenStax

Publisher:OpenStax

Chapter9: Current And Resistance

Section: Chapter Questions

Problem 31P: Consider a wire of a circular cross-section with a radius of R = 3.00mm. The magnitude of the...

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Concept explainers

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Ohm’s law is a prominent concept in physics and electronics. It gives the relation between the current and the voltage. It is used to analyze and construct electrical circuits. Ohm's law states that the voltage across a conductor is directly proportional to the current flowing through it.

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Question

A beam contains 2.7 x 10' doubly charged positive ions per cubic centimeter, all of which are moving north with a speed of 4.0 x 105
m/s. What is (a) the magnitude of the current density and (b) direction of the current density J .(c) What additional quantity do
you need to calculate the total current i in this ion beam?

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