Suppose the earth's magnetic field is 3 x 10-5 T at the equator and falls offas 1/r, as for a perfect dipole. Let there be an isotropic population of 1-eVprotons and 30-keV electrons, each with density n = 10' m-3 atr = 5 earth radiiin the equatorial plane.(a) Compute the ion and electron VB drift velocities.(b) Does an electron drift eastward or westward?(c) How long does it take an electron to encircle the earth?(d) Compute the ring current density in A/m2.Note: The curvature drift is not negligible and will affect the numerical answer,but neglect it anyway.

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Suppose the earth's magnetic field is 3 x 10-T at the equator and falls off as 1/r', as for a perfect dipole. Let there be an isotropic population of 1-eV protons and 30-keV electrons, each with density n = 10' m- at r = 5 earth radii in the equatorial plane.

Suppose the earth's magnetic field is 3 x 10-T at the equator and falls off as 1/r', as for a perfect dipole. Let there be an isotropic population of 1-eV protons and 30-keV electrons, each with density n = 10' m- at r = 5 earth radii in the equatorial plane.

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

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Question

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Suppose the earth's magnetic field is 3 x 10-5 T at the equator and falls off
as 1/r, as for a perfect dipole. Let there be an isotropic population of 1-eV
protons and 30-keV electrons, each with density n = 10' m-3 atr = 5 earth radii
in the equatorial plane.
(a) Compute the ion and electron VB drift velocities.
(b) Does an electron drift eastward or westward?
(c) How long does it take an electron to encircle the earth?
(d) Compute the ring current density in A/m2.
Note: The curvature drift is not negligible and will affect the numerical answer,
but neglect it anyway.

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