An electron with kinetic energy 2.5 keV moving along the positive direction of an x axis enters a region in which a uniform electric field of magnitude 10 kV//m is in the negative direction of the y-axis. A uniform magnetic field vecB is to be set up to keep the electron moving along the x-axis , and the direction vecB of is to be chosen to minimize the required magnitude of vecB. In unit-vector notation, what vecB should be set up?

An electron with kinetic energy 2.5 keV moving along the positive dire

1.	An electron with kinetic energy 2.5 keV moving along the positive direction of an x axis enters a region in which a uniform electric field of magnitude 10 kV//m is in the negative direction of the y-axis. A uniform magnetic field vecB is to be set up to keep the electron moving along the x-axis , and the direction vecB of is to be chosen to minimize the required magnitude of vecB. In unit-vector notation, what vecB should be set up?
Answer» ANSWER :`3.4xx10^(-4)T`

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