In a region of free space, where a uniform and constant electric field of intensity Ē and a magnetic field of induction B coexist, an electron projected with speed v in the positive x-direction, moves undeviated without change in speed. In addition, an electron projected with velocity v in the positive y-direction in this region; also, moves undeviated without change in speed. Which of the following conclusions can you make? (a) \Ē| < v\Ě (b) |티-ulB (c) The electric field is perpendicular to the x-y plane. (d)The magnetic field is either at 45° or 135° with the positive x- direction.

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Chapter1: Units, Trigonometry. And Vectors
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7. In a region of free space, where a uniform and constant electric field of
intensity E and a magnetic field of induction B coexist, an electron
projected with speed v in the positive x-direction, moves undeviated
without change in speed. In addition, an electron projected with velocity
v in the positive y-direction in this region; also, moves undeviated
without change in speed. Which of the following conclusions can you
make?
(a) \Ë| < v]B|
(b) |Ė| = v\B|
(c) The electric field is perpendicular to the x-y plane.
(d)The magnetic field is either at 45° or 135° with the positive x-
direction.
Transcribed Image Text:7. In a region of free space, where a uniform and constant electric field of intensity E and a magnetic field of induction B coexist, an electron projected with speed v in the positive x-direction, moves undeviated without change in speed. In addition, an electron projected with velocity v in the positive y-direction in this region; also, moves undeviated without change in speed. Which of the following conclusions can you make? (a) \Ë| < v]B| (b) |Ė| = v\B| (c) The electric field is perpendicular to the x-y plane. (d)The magnetic field is either at 45° or 135° with the positive x- direction.
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