A beam contains 7.8 x 106 doubly charged positive ions per cubic centimeter, all of which are moving north with a speed of 7.3 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? (a) Number i Units (b)

A beam contains 7.8 x 106 doubly charged positive ions per cubic centimeter, all of which are moving north with a speed of 7.3 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? (a) Number i Units (b)

University Physics Volume 2

18th Edition

ISBN:9781938168161

Author:OpenStax

Publisher:OpenStax

Chapter9: Current And Resistance

Section: Chapter Questions

Problem 42P: What current flows through a 2.54-cm-diameter rod of Pure silicon that is 20.0 cm long, when 1.00103...

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