phy2049_f11_exam2_practice

2x 107 ms in the i direction what magnetic field is

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Unformatted text preview: + 2. A beam of electrons (“cathode rays”) is sent between two parallel electric plates with an electric field between them of 2x10^4 N/C j^ s . If the electron beam travels perpendicular to the electric field with a velocity of 4.2x 10^7 m/s in the +i direction, what magnetic field is necessary (direction and magnitude) so that the electrons continue traveling in a straight line without deflection by the electric field? PHY2049 Fall11 Exam 2 3. The magnetic field of a solenoid (long compared to its r...
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